{"id":31667,"date":"2025-07-26T15:49:28","date_gmt":"2025-07-26T08:49:28","guid":{"rendered":"https:\/\/vmts.ch\/?p=31667"},"modified":"2025-07-26T16:03:59","modified_gmt":"2025-07-26T09:03:59","slug":"du-lieu-point-cloud","status":"publish","type":"post","link":"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/","title":{"rendered":"T\u00ecm Hi\u1ec3u D\u1eef Li\u1ec7u Point Cloud: \u0110\u1ecbnh D\u1ea1ng, Vai Tr\u00f2 v\u00e0 \u1ee8ng D\u1ee5ng Trong C\u00f4ng Ngh\u1ec7 3D"},"content":{"rendered":"\r\n<p>Trong b\u1ed1i c\u1ea3nh c\u00f4ng ngh\u1ec7 3D \u0111ang ph\u00e1t tri\u1ec3n v\u0169 b\u00e3o,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0\u0111\u00e3 n\u1ed5i l\u00ean nh\u01b0 m\u1ed9t tr\u1ee5 c\u1ed9t kh\u00f4ng th\u1ec3 thi\u1ebfu, cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft v\u00e0 kh\u00e1ch quan v\u1ec1 th\u1ebf gi\u1edbi th\u1ef1c. Vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>, c\u00e1c \u0111\u1ecbnh d\u1ea1ng c\u1ee7a n\u00f3 v\u00e0 vai tr\u00f2 trong nhi\u1ec1u l\u0129nh v\u1ef1c l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 khai th\u00e1c t\u1ed1i \u0111a ti\u1ec1m n\u0103ng to l\u1edbn m\u00e0 n\u00f3 mang l\u1ea1i.<\/p>\r\n\r\n\r\n\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i Dung B\u00e0i Vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Gioi_thieu_khai_quat_ve_Point_Cloud_va_vai_tro_cua_du_lieu_trong_cong_nghe_3D_khao_sat_hien_trang_xay_dung_BIM\" >Gi\u1edbi thi\u1ec7u kh\u00e1i qu\u00e1t v\u1ec1 Point Cloud v\u00e0 vai tr\u00f2 c\u1ee7a d\u1eef li\u1ec7u trong c\u00f4ng ngh\u1ec7 3D, kh\u1ea3o s\u00e1t hi\u1ec7n tr\u1ea1ng, x\u00e2y d\u1ef1ng BIM.<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Ban_chat_va_tam_quan_trong_cua_Point_Cloud_trong_ky_nguyen_so\" >B\u1ea3n ch\u1ea5t v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a Point Cloud trong k\u1ef7 nguy\u00ean s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Vai_tro_cua_Point_Cloud_trong_khao_sat_hien_trang_va_quy_hoach_do_thi\" >Vai tr\u00f2 c\u1ee7a Point Cloud trong kh\u1ea3o s\u00e1t hi\u1ec7n tr\u1ea1ng v\u00e0 quy ho\u1ea1ch \u0111\u00f4 th\u1ecb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Gia_tri_ung_dung_cua_Point_Cloud_trong_xay_dung_thong_tin_cong_trinh_BIM\" >Gi\u00e1 tr\u1ecb \u1ee9ng d\u1ee5ng c\u1ee7a Point Cloud trong x\u00e2y d\u1ef1ng th\u00f4ng tin c\u00f4ng tr\u00ecnh (BIM)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Y_nghia_cua_viec_hieu_ro_cac_dinh_dang_du_lieu_de_toi_uu_hoa_Point_Cloud\" >\u00dd ngh\u0129a c\u1ee7a vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a Point Cloud<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Dinh_nghia_Point_Cloud_va_du_lieu_Point_Cloud\" >\u0110\u1ecbnh ngh\u0129a Point Cloud v\u00e0 d\u1eef li\u1ec7u Point Cloud<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Khai_niem_co_ban_ve_Point_Cloud_%E2%80%93_%E2%80%9Cdam_may_diem%E2%80%9D\" >Kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 Point Cloud \u2013 &#8220;\u0111\u00e1m m\u00e2y \u0111i\u1ec3m&#8221;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Cac_thanh_phan_tao_nen_mot_tap_du_lieu_Point_Cloud_hoan_chinh\" >C\u00e1c th\u00e0nh ph\u1ea7n t\u1ea1o n\u00ean m\u1ed9t t\u1eadp d\u1eef li\u1ec7u Point Cloud ho\u00e0n ch\u1ec9nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Tu_qua_trinh_thu_thap_den_su_hinh_thanh_du_lieu_Point_Cloud\" >T\u1eeb qu\u00e1 tr\u00ecnh thu th\u1eadp \u0111\u1ebfn s\u1ef1 h\u00ecnh th\u00e0nh d\u1eef li\u1ec7u Point Cloud<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Tai_sao_Point_Cloud_khong_chi_la_mot_tap_hop_cac_diem\" >T\u1ea1i sao Point Cloud kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Cac_dinh_dang_du_lieu_Point_Cloud_pho_bien\" >C\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u Point Cloud ph\u1ed5 bi\u1ebfn<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Dinh_dang_LAS_LAZ_%E2%80%93_Chuan_muc_trong_nganh_Land_Surveying\" >\u0110\u1ecbnh d\u1ea1ng LAS \/ LAZ \u2013 Chu\u1ea9n m\u1ef1c trong ng\u00e0nh Land Surveying<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Dinh_dang_E57_%E2%80%93_Tieu_chuan_mo_cho_trao_doi_du_lieu_quet\" >\u0110\u1ecbnh d\u1ea1ng E57 \u2013 Ti\u00eau chu\u1ea9n m\u1edf cho trao \u0111\u1ed5i d\u1eef li\u1ec7u qu\u00e9t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Dinh_dang_RCS_RCP_%E2%80%93_Doi_tac_khong_the_thieu_trong_du_an_Autodesk\" >\u0110\u1ecbnh d\u1ea1ng RCS \/ RCP \u2013 \u0110\u1ed1i t\u00e1c kh\u00f4ng th\u1ec3 thi\u1ebfu trong d\u1ef1 \u00e1n Autodesk<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Dinh_dang_PTS_%E2%80%93_Cau_truc_van_ban_de_hieu_nhung_van_co_han_che\" >\u0110\u1ecbnh d\u1ea1ng PTS \u2013 C\u1ea5u tr\u00fac v\u0103n b\u1ea3n d\u1ec5 hi\u1ec3u nh\u01b0ng v\u1eabn c\u00f3 h\u1ea1n ch\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Dinh_dang_XYZ_%E2%80%93_Tuong_lai_voi_kha_nang_co_ban\" >\u0110\u1ecbnh d\u1ea1ng XYZ \u2013 T\u01b0\u01a1ng lai v\u1edbi kh\u1ea3 n\u0103ng c\u01a1 b\u1ea3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Dinh_dang_PLY_%E2%80%93_Luu_tru_tinh_vi_cho_mo_hinh_da_giac\" >\u0110\u1ecbnh d\u1ea1ng PLY \u2013 L\u01b0u tr\u1eef tinh vi cho m\u00f4 h\u00ecnh \u0111a gi\u00e1c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/vmts.ch\/vi\/du-lieu-point-cloud\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Gioi_thieu_khai_quat_ve_Point_Cloud_va_vai_tro_cua_du_lieu_trong_cong_nghe_3D_khao_sat_hien_trang_xay_dung_BIM\"><\/span>Gi\u1edbi thi\u1ec7u kh\u00e1i qu\u00e1t v\u1ec1 Point Cloud v\u00e0 vai tr\u00f2 c\u1ee7a d\u1eef li\u1ec7u trong c\u00f4ng ngh\u1ec7 3D, kh\u1ea3o s\u00e1t hi\u1ec7n tr\u1ea1ng, x\u00e2y d\u1ef1ng BIM.<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Trong k\u1ef7 nguy\u00ean s\u1ed1 h\u00f3a v\u00e0 c\u00f4ng ngh\u1ec7 3D b\u00f9ng n\u1ed5,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0\u0111\u00e3 v\u00e0 \u0111ang kh\u1eb3ng \u0111\u1ecbnh v\u1ecb th\u1ebf l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i d\u1eef li\u1ec7u quan tr\u1ecdng nh\u1ea5t, mang l\u1ea1i c\u00e1i nh\u00ecn ch\u00e2n th\u1ef1c v\u00e0 to\u00e0n di\u1ec7n v\u1ec1 th\u1ebf gi\u1edbi v\u1eadt l\u00fd xung quanh ch\u00fang ta. Point cloud, hay c\u00f2n g\u1ecdi l\u00e0 &#8220;\u0111\u00e1m m\u00e2y \u0111i\u1ec3m&#8221;, v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p kh\u1ed5ng l\u1ed3 c\u00e1c \u0111i\u1ec3m trong kh\u00f4ng gian 3 chi\u1ec1u, m\u1ed7i \u0111i\u1ec3m \u0111\u1ea1i di\u1ec7n cho m\u1ed9t v\u1ecb tr\u00ed c\u1ee5 th\u1ec3 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c m\u00f4i tr\u01b0\u1eddng \u0111\u00e3 \u0111\u01b0\u1ee3c qu\u00e9t. C\u00e1c \u0111i\u1ec3m n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 t\u1ecda \u0111\u1ed9 (X, Y, Z) m\u00e0 c\u00f2n c\u00f3 th\u1ec3 ch\u1ee9a \u0111\u1ef1ng nhi\u1ec1u th\u00f4ng tin phong ph\u00fa kh\u00e1c nh\u01b0 m\u00e0u s\u1eafc (RGB), c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1 laser, th\u1eddi gian bay, ho\u1eb7c ph\u00e2n lo\u1ea1i \u0111\u1ed1i t\u01b0\u1ee3ng, l\u00e0m cho ch\u00fang tr\u1edf th\u00e0nh m\u1ed9t b\u1ee9c tranh s\u1ed1 s\u1ed1ng \u0111\u1ed9ng, chi ti\u1ebft v\u00e0 v\u00f4 c\u00f9ng h\u1eefu \u00edch.<\/p>\r\n\r\n\r\n\r\n<p>T\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c hi\u1ec3u c\u00e1c \u0111\u1ecbnh d\u1ea1ng\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0\u0111\u1ec3 ch\u1ecdn l\u1ef1a v\u00e0 x\u1eed l\u00fd ph\u00f9 h\u1ee3p l\u00e0 kh\u00f4ng th\u1ec3 ph\u1ee7 nh\u1eadn. M\u1ed7i \u0111\u1ecbnh d\u1ea1ng \u0111\u1ec1u c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m ri\u00eang v\u1ec1 c\u1ea5u tr\u00fac, kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef th\u00f4ng tin, m\u1ee9c \u0111\u1ed9 n\u00e9n v\u00e0 m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c ph\u1ea7n m\u1ec1m kh\u00e1c nhau. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1ecbnh d\u1ea1ng kh\u00f4ng ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 l\u01b0u tr\u1eef v\u00e0 t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd m\u00e0 c\u00f2n quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn kh\u1ea3 n\u0103ng t\u00edch h\u1ee3p\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0v\u00e0o quy tr\u00ecnh l\u00e0m vi\u1ec7c t\u1ed5ng th\u1ec3, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c l\u0129nh v\u1ef1c chuy\u00ean bi\u1ec7t nh\u01b0 kh\u1ea3o s\u00e1t, x\u00e2y d\u1ef1ng BIM (Building Information Modeling) hay th\u1eadm ch\u00ed l\u00e0 ph\u00e1t tri\u1ec3n th\u1ef1c t\u1ebf \u1ea3o\/th\u1ef1c t\u1ebf t\u0103ng c\u01b0\u1eddng (AR\/VR). M\u1ed9t l\u1ef1a ch\u1ecdn sai l\u1ea7m c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t m\u00e1t th\u00f4ng tin, gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u ho\u1eb7c g\u00e2y ra c\u00e1c r\u00e0o c\u1ea3n \u0111\u00e1ng k\u1ec3 trong qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i v\u00e0 h\u1ee3p t\u00e1c gi\u1eefa c\u00e1c b\u00ean li\u00ean quan. Do \u0111\u00f3, vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c kh\u00eda c\u1ea1nh n\u00e0y s\u1ebd gi\u00fap c\u00e1c chuy\u00ean gia t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh l\u00e0m vi\u1ec7c, n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng d\u1ef1 \u00e1n v\u00e0 khai th\u00e1c tri\u1ec7t \u0111\u1ec3 gi\u00e1 tr\u1ecb c\u1ee7a\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ban_chat_va_tam_quan_trong_cua_Point_Cloud_trong_ky_nguyen_so\"><\/span>B\u1ea3n ch\u1ea5t v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a Point Cloud trong k\u1ef7 nguy\u00ean s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Point cloud \u0111\u1ea1i di\u1ec7n cho m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p thu th\u1eadp d\u1eef li\u1ec7u kh\u00f4ng gian ba chi\u1ec1u v\u00f4 c\u00f9ng m\u1ea1nh m\u1ebd, cho ph\u00e9p ch\u00fang ta &#8220;s\u1ed1 h\u00f3a&#8221; th\u1ef1c t\u1ebf v\u1eadt l\u00fd v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 chi ti\u1ebft ch\u01b0a t\u1eebng c\u00f3. T\u1eeb nh\u1eefng c\u00f4ng tr\u00ecnh ki\u1ebfn tr\u00fac ph\u1ee9c t\u1ea1p, c\u00e1c khu v\u1ef1c \u0111\u1ecba h\u00ecnh r\u1ed9ng l\u1edbn, \u0111\u1ebfn nh\u1eefng chi ti\u1ebft nh\u1ecf nh\u1ea5t c\u1ee7a m\u1ed9t chi ti\u1ebft c\u01a1 kh\u00ed, Point Cloud c\u00f3 kh\u1ea3 n\u0103ng ghi l\u1ea1i m\u1ecdi b\u1ec1 m\u1eb7t, h\u00ecnh d\u1ea1ng v\u00e0 c\u1ea5u tr\u00fac m\u1ed9t c\u00e1ch trung th\u1ef1c. S\u1ef1 b\u00f9ng n\u1ed5 c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 qu\u00e9t 3D nh\u01b0 m\u00e1y qu\u00e9t laser m\u1eb7t \u0111\u1ea5t (terrestrial laser scanners &#8211; TLS), UAV (Unmanned Aerial Vehicle) v\u1edbi LiDAR, hay camera ch\u1ee5p \u1ea3nh l\u1eadp th\u1ec3 (photogrammetry) \u0111\u00e3 bi\u1ebfn vi\u1ec7c thu th\u1eadp\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0tr\u1edf n\u00ean d\u1ec5 d\u00e0ng v\u00e0 ph\u1ed5 bi\u1ebfn h\u01a1n bao gi\u1edd h\u1ebft, \u0111\u01b0a n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>\r\n\r\n\r\n\r\n<p>T\u1ea7m quan tr\u1ecdng c\u1ee7a Point Cloud kh\u00f4ng ch\u1ec9 n\u1eb1m \u1edf kh\u1ea3 n\u0103ng sao ch\u00e9p th\u1ef1c t\u1ebf m\u00e0 c\u00f2n \u1edf ti\u1ec1m n\u0103ng ph\u00e2n t\u00edch v\u00e0 khai th\u00e1c th\u00f4ng tin t\u1eeb\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0\u0111\u00f3. N\u00f3 cung c\u1ea5p m\u1ed9t &#8220;kh\u1ea9u v\u1ecb&#8221; d\u1eef li\u1ec7u kh\u00e1ch quan, kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nh\u1eefng di\u1ec5n gi\u1ea3i ch\u1ee7 quan nh\u01b0 c\u00e1c b\u1ea3n v\u1ebd 2D truy\u1ec1n th\u1ed1ng. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p c\u00e1c k\u1ef9 s\u01b0, ki\u1ebfn tr\u00fac s\u01b0, nh\u00e0 quy ho\u1ea1ch \u0111\u00f4 th\u1ecb \u0111\u01b0a ra c\u00e1c quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean b\u1eb1ng ch\u1ee9ng, t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf, ki\u1ec3m tra \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng, ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec. Trong k\u1ef7 nguy\u00ean s\u1ed1, n\u01a1i m\u1ecdi th\u1ee9 \u0111\u1ec1u h\u01b0\u1edbng t\u1edbi s\u1ef1 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3, Point Cloud th\u1ef1c s\u1ef1 l\u00e0 m\u1ed9t n\u1ec1n t\u1ea3ng d\u1eef li\u1ec7u c\u01a1 b\u1ea3n cho c\u00e1c \u1ee9ng d\u1ee5ng th\u00f4ng minh v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vai_tro_cua_Point_Cloud_trong_khao_sat_hien_trang_va_quy_hoach_do_thi\"><\/span>Vai tr\u00f2 c\u1ee7a Point Cloud trong kh\u1ea3o s\u00e1t hi\u1ec7n tr\u1ea1ng v\u00e0 quy ho\u1ea1ch \u0111\u00f4 th\u1ecb<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Trong l\u0129nh v\u1ef1c kh\u1ea3o s\u00e1t \u0111\u1ecba h\u00ecnh v\u00e0 kh\u1ea3o s\u00e1t hi\u1ec7n tr\u1ea1ng c\u00f4ng tr\u00ecnh,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0\u0111\u00e3 c\u00e1ch m\u1ea1ng h\u00f3a c\u00e1ch ch\u00fang ta th\u1ef1c hi\u1ec7n c\u00e1c nhi\u1ec7m v\u1ee5 n\u00e0y. Thay v\u00ec c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n th\u1ed1ng t\u1ed1n th\u1eddi gian nh\u01b0 \u0111o \u0111\u1ea1c th\u1ee7 c\u00f4ng ho\u1eb7c s\u1eed d\u1ee5ng m\u00e1y to\u00e0n \u0111\u1ea1c \u0111i\u1ec7n t\u1eed v\u1edbi s\u1ed1 \u0111i\u1ec3m h\u1ea1n ch\u1ebf, c\u00f4ng ngh\u1ec7 qu\u00e9t Point Cloud cho ph\u00e9p thu th\u1eadp h\u00e0ng tri\u1ec7u \u0111i\u1ec3m d\u1eef li\u1ec7u trong th\u1eddi gian ng\u1eafn, t\u1ea1o ra m\u1ed9t m\u00f4 h\u00ecnh 3D d\u00e0y \u0111\u1eb7c v\u00e0 ch\u00ednh x\u00e1c c\u1ee7a m\u00f4i tr\u01b0\u1eddng hi\u1ec7n h\u1eefu. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 t\u0103ng t\u1ed1c \u0111\u1ed9 c\u00f4ng vi\u1ec7c m\u00e0 c\u00f2n gi\u1ea3m thi\u1ec3u r\u1ee7i ro sai s\u00f3t do con ng\u01b0\u1eddi, cung c\u1ea5p m\u1ed9t b\u1ee9c tranh to\u00e0n di\u1ec7n v\u00e0 kh\u00e1ch quan h\u01a1n v\u1ec1 hi\u1ec7n tr\u1ea1ng.<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><\/figure>\r\n<p><img decoding=\"async\" class=\"lazyload alignnone size-full wp-image-31684\" src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud.jpg\" data-orig-src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud.jpg\" alt=\"c\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u point cloud\" width=\"1380\" height=\"920\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271380%27%20height%3D%27920%27%20viewBox%3D%270%200%201380%20920%27%3E%3Crect%20width%3D%271380%27%20height%3D%27920%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-200x133.jpg 200w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-300x200.jpg 300w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-400x267.jpg 400w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-600x400.jpg 600w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-768x512.jpg 768w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-800x533.jpg 800w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-1024x683.jpg 1024w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud-1200x800.jpg 1200w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/tim-hieu-cac-dinh-dang-du-lieu-point-cloud.jpg 1380w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1380px) 100vw, 1380px\" \/><\/p>\r\n\r\n\r\n\r\n<p><strong>D\u1eef li\u1ec7u point cloud<\/strong>\u00a0\u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho vi\u1ec7c kh\u1ea3o s\u00e1t c\u00e1c khu v\u1ef1c kh\u00f3 ti\u1ebfp c\u1eadn, c\u00e1c t\u00f2a nh\u00e0 l\u1ecbch s\u1eed c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o t\u1ed3n, ho\u1eb7c c\u00e1c c\u00f4ng tr\u00ecnh c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng ph\u1ee9c t\u1ea1p. Ch\u00fang l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 t\u1ea1o ra c\u00e1c b\u1ea3n v\u1ebd m\u1eb7t b\u1eb1ng, m\u1eb7t c\u1eaft, h\u00ecnh chi\u1ebfu \u0111\u1ee9ng m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng, ho\u1eb7c \u0111\u1ec3 gi\u00e1m s\u00e1t s\u1ef1 bi\u1ebfn d\u1ea1ng c\u1ee7a c\u00f4ng tr\u00ecnh theo th\u1eddi gian. Trong quy ho\u1ea1ch \u0111\u00f4 th\u1ecb, Point Cloud cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft v\u1ec1 kh\u00f4ng gian \u0111\u00f4 th\u1ecb, m\u1eadt \u0111\u1ed9 x\u00e2y d\u1ef1ng, c\u00e2y xanh, v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng, gi\u00fap c\u00e1c nh\u00e0 quy ho\u1ea1ch \u0111\u01b0a ra c\u00e1c quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t h\u01a1n v\u1ec1 ph\u00e1t tri\u1ec3n, qu\u1ea3n l\u00fd kh\u00f4ng gian c\u00f4ng c\u1ed9ng, v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng s\u1ed1ng. Kh\u1ea3 n\u0103ng truy c\u1eadp v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u 3D m\u1ed9t c\u00e1ch to\u00e0n di\u1ec7n t\u1eeb Point Cloud l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn v\u01b0\u1ee3t b\u1eadc trong vi\u1ec7c h\u00ecnh dung v\u00e0 qu\u1ea3n l\u00fd m\u00f4i tr\u01b0\u1eddng \u0111\u00f4 th\u1ecb c\u1ee7a ch\u00fang ta.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Gia_tri_ung_dung_cua_Point_Cloud_trong_xay_dung_thong_tin_cong_trinh_BIM\"><\/span>Gi\u00e1 tr\u1ecb \u1ee9ng d\u1ee5ng c\u1ee7a Point Cloud trong x\u00e2y d\u1ef1ng th\u00f4ng tin c\u00f4ng tr\u00ecnh (BIM)<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Trong ng\u00e0nh x\u00e2y d\u1ef1ng, BIM \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t chu\u1ea9n m\u1ef1c cho vi\u1ec7c thi\u1ebft k\u1ebf, x\u00e2y d\u1ef1ng v\u00e0 qu\u1ea3n l\u00fd c\u00e1c d\u1ef1 \u00e1n. V\u00e0\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0ch\u00ednh l\u00e0 c\u1ea7u n\u1ed1i quan tr\u1ecdng gi\u1eefa th\u1ebf gi\u1edbi v\u1eadt l\u00fd v\u00e0 m\u00f4 h\u00ecnh BIM k\u1ef9 thu\u1eadt s\u1ed1. Khi k\u1ebft h\u1ee3p Point Cloud v\u1edbi BIM, kh\u1ea3 n\u0103ng c\u1ee7a ch\u00fang ta trong vi\u1ec7c qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi d\u1ef1 \u00e1n \u0111\u01b0\u1ee3c n\u00e2ng l\u00ean m\u1ed9t t\u1ea7m cao m\u1edbi.\u00a0<strong>D\u1eef li\u1ec7u point cloud<\/strong>\u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra &#8220;BIM t\u1eeb hi\u1ec7n tr\u1ea1ng&#8221; (As-built BIM), b\u1eb1ng c\u00e1ch qu\u00e9t c\u00e1c c\u00f4ng tr\u00ecnh hi\u1ec7n c\u00f3 v\u00e0 chuy\u1ec3n \u0111\u1ed5i ch\u00fang th\u00e0nh m\u00f4 h\u00ecnh BIM chi ti\u1ebft. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t c\u00f3 gi\u00e1 tr\u1ecb trong c\u00e1c d\u1ef1 \u00e1n c\u1ea3i t\u1ea1o, m\u1edf r\u1ed9ng, ho\u1eb7c b\u1ea3o tr\u00ec, n\u01a1i c\u00e1c b\u1ea3n v\u1ebd g\u1ed1c c\u00f3 th\u1ec3 kh\u00f4ng c\u00f2n ch\u00ednh x\u00e1c ho\u1eb7c kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7.<\/p>\r\n\r\n\r\n\r\n<p>Nh\u1edd\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf v\u00e0 k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n xung \u0111\u1ed9t (clash detection) gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng m\u1edbi v\u00e0 c\u1ea5u tr\u00fac hi\u1ec7n c\u00f3 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ecdi thay \u0111\u1ed5i \u0111\u1ec1u ph\u00f9 h\u1ee3p v\u1edbi th\u1ef1c t\u1ebf. N\u00f3 c\u0169ng gi\u00fap theo d\u00f5i ti\u1ebfn \u0111\u1ed9 x\u00e2y d\u1ef1ng b\u1eb1ng c\u00e1ch so s\u00e1nh\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0c\u1ee7a c\u00f4ng tr\u00ecnh \u0111ang thi c\u00f4ng v\u1edbi m\u00f4 h\u00ecnh thi\u1ebft k\u1ebf BIM, nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh b\u1ea5t k\u1ef3 sai l\u1ec7ch n\u00e0o. H\u01a1n n\u1eefa, Point Cloud c\u00f2n cung c\u1ea5p m\u1ed9t n\u1ec1n t\u1ea3ng ch\u00e2n th\u1ef1c cho vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch thi c\u00f4ng, qu\u1ea3n l\u00fd t\u00e0i s\u1ea3n sau khi ho\u00e0n th\u00e0nh, v\u00e0 th\u1eadm ch\u00ed l\u00e0 t\u00edch h\u1ee3p v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf v\u1eadt ch\u1ea5t (FM). Vi\u1ec7c s\u1eed d\u1ee5ng\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0trong BIM kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u00e0 c\u00f2n l\u00e0 m\u1ed9t t\u01b0 duy m\u1edbi, gi\u00fap gi\u1ea3m chi ph\u00ed, t\u0103ng hi\u1ec7u qu\u1ea3 v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 c\u1ee7a c\u00e1c d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Y_nghia_cua_viec_hieu_ro_cac_dinh_dang_du_lieu_de_toi_uu_hoa_Point_Cloud\"><\/span>\u00dd ngh\u0129a c\u1ee7a vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a Point Cloud<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Vi\u1ec7c thu th\u1eadp\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0ch\u1ec9 l\u00e0 b\u01b0\u1edbc kh\u1edfi \u0111\u1ea7u; kh\u1ea3 n\u0103ng khai th\u00e1c gi\u00e1 tr\u1ecb t\u1eeb ch\u00fang n\u1eb1m \u1edf vi\u1ec7c x\u1eed l\u00fd, qu\u1ea3n l\u00fd v\u00e0 s\u1eed d\u1ee5ng ch\u00fang m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. V\u00e0 \u0111\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3, vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1ecbnh d\u1ea1ng\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0l\u00e0 \u0111i\u1ec1u t\u1ed1i c\u1ea7n thi\u1ebft. M\u1ed7i \u0111\u1ecbnh d\u1ea1ng kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t c\u00e1ch l\u01b0u tr\u1eef m\u00e0 c\u00f2n mang theo nh\u1eefng \u0111\u1eb7c t\u00ednh ri\u00eang v\u1ec1 c\u1ea5u tr\u00fac, kh\u1ea3 n\u0103ng n\u00e9n, l\u01b0\u1ee3ng th\u00f4ng tin c\u00f3 th\u1ec3 ch\u1ee9a \u0111\u1ef1ng, v\u00e0 quan tr\u1ecdng nh\u1ea5t l\u00e0 m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng kh\u00e1c nhau. M\u1ed9t \u0111\u1ecbnh d\u1ea1ng c\u00f3 th\u1ec3 t\u1ed1i \u01b0u cho vi\u1ec7c thu th\u1eadp v\u00e0 l\u01b0u tr\u1eef ban \u0111\u1ea7u (v\u00ed d\u1ee5: c\u00e1c \u0111\u1ecbnh d\u1ea1ng c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t scanner), trong khi m\u1ed9t \u0111\u1ecbnh d\u1ea1ng kh\u00e1c l\u1ea1i v\u01b0\u1ee3t tr\u1ed9i trong vi\u1ec7c n\u00e9n v\u00e0 trao \u0111\u1ed5i d\u1eef li\u1ec7u qua m\u1ea1ng, ho\u1eb7c trong vi\u1ec7c t\u00edch h\u1ee3p v\u00e0o ph\u1ea7n m\u1ec1m thi\u1ebft k\u1ebf 3D.<\/p>\r\n\r\n\r\n\r\n<p>N\u1ebfu kh\u00f4ng c\u00f3 s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 c\u00e1c \u0111\u1ecbnh d\u1ea1ng n\u00e0y, c\u00e1c chuy\u00ean gia c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i nh\u1eefng th\u00e1ch th\u1ee9c l\u1edbn. Ch\u1eb3ng h\u1ea1n, vi\u1ec7c ch\u1ecdn m\u1ed9t \u0111\u1ecbnh d\u1ea1ng kh\u00f4ng ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u00edch th\u01b0\u1edbc t\u1ec7p tin kh\u1ed5ng l\u1ed3, l\u00e0m ch\u1eadm tr\u1ec5 qu\u00e1 tr\u00ecnh x\u1eed l\u00fd v\u00e0 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u. Ho\u1eb7c t\u1ec7 h\u01a1n, n\u00f3 c\u00f3 th\u1ec3 g\u00e2y ra m\u1ea5t m\u00e1t th\u00f4ng tin quan tr\u1ecdng nh\u01b0 th\u00f4ng tin m\u00e0u s\u1eafc, c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1, ho\u1eb7c c\u00e1c thu\u1ed9c t\u00ednh ph\u00e2n lo\u1ea1i, l\u00e0m gi\u1ea3m gi\u00e1 tr\u1ecb c\u1ee7a\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>. Ng\u01b0\u1ee3c l\u1ea1i, vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng t\u1ed1i \u01b0u s\u1ebd gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a quy tr\u00ecnh l\u00e0m vi\u1ec7c, t\u1ed1i \u0111a h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a ph\u1ea7n m\u1ec1m, v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u trong su\u1ed1t v\u00f2ng \u0111\u1eddi d\u1ef1 \u00e1n. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c h\u1ee3p t\u00e1c, n\u01a1i vi\u1ec7c trao \u0111\u1ed5i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c b\u00ean, m\u1ed7i b\u00ean s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 quy tr\u00ecnh kh\u00e1c nhau, l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t cho s\u1ef1 th\u00e0nh c\u00f4ng. Do \u0111\u00f3, vi\u1ec7c \u0111\u1ea7u t\u01b0 th\u1eddi gian \u0111\u1ec3 nghi\u00ean c\u1ee9u v\u00e0 n\u1eafm v\u1eefng c\u00e1c \u0111\u1ecbnh d\u1ea1ng\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng c\u1ea7n thi\u1ebft m\u00e0 c\u00f2n l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf c\u1ea1nh tranh \u0111\u00e1ng k\u1ec3 trong ng\u00e0nh c\u00f4ng ngh\u1ec7 3D.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_nghia_Point_Cloud_va_du_lieu_Point_Cloud\"><\/span>\u0110\u1ecbnh ngh\u0129a Point Cloud v\u00e0 d\u1eef li\u1ec7u Point Cloud<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Point Cloud, hay c\u00f2n g\u1ecdi l\u00e0 &#8220;\u0111\u00e1m m\u00e2y \u0111i\u1ec3m&#8221;, l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m trung t\u00e2m trong th\u1ebf gi\u1edbi c\u00f4ng ngh\u1ec7 3D v\u00e0 kh\u00f4ng gian s\u1ed1. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111\u00f3 l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m r\u1eddi r\u1ea1c trong kh\u00f4ng gian ba chi\u1ec1u, n\u01a1i m\u1ed7i \u0111i\u1ec3m \u0111\u1ea1i di\u1ec7n cho m\u1ed9t v\u1ecb tr\u00ed c\u1ee5 th\u1ec3 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c m\u00f4i tr\u01b0\u1eddng. T\u01b0\u1edfng t\u01b0\u1ee3ng nh\u01b0 b\u1ea1n d\u00f9ng m\u1ed9t chi\u1ebfc c\u1ecd \u0111\u1ec3 v\u1ebd l\u00ean m\u1ed9t v\u1eadt th\u1ec3, nh\u01b0ng thay v\u00ec c\u00e1c \u0111\u01b0\u1eddng n\u00e9t li\u1ec1n m\u1ea1ch, b\u1ea1n ch\u1ec9 \u0111\u1eb7t nh\u1eefng ch\u1ea5m nh\u1ecf li ti, d\u00e0y \u0111\u1eb7c \u0111\u1ebfn m\u1ee9c khi nh\u00ecn t\u1eeb xa, nh\u1eefng ch\u1ea5m \u0111\u00f3 li\u00ean k\u1ebft l\u1ea1i th\u00e0nh h\u00ecnh d\u1ea1ng c\u1ee7a v\u1eadt th\u1ec3. \u0110\u00f3 ch\u00ednh l\u00e0 \u00fd t\u01b0\u1edfng c\u01a1 b\u1ea3n \u0111\u1eb1ng \u0111\u1ecbnh ngh\u0129a Point Cloud.<\/p>\r\n\r\n\r\n\r\n<p>Tuy nhi\u00ean,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c t\u1ecda \u0111\u1ed9 (X, Y, Z). \u0110\u1ec3 th\u1ef1c s\u1ef1 c\u00f3 gi\u00e1 tr\u1ecb, m\u1ed7i \u0111i\u1ec3m trong \u0111\u00e1m m\u00e2y th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi c\u00e1c th\u00f4ng tin b\u1ed5 sung, l\u00e0m phong ph\u00fa th\u00eam &#8220;b\u1ee9c tranh&#8221; s\u1ed1 n\u00e0y. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m m\u00e0u s\u1eafc, c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng (intensity), th\u1eddi gian bay (timestamp), hay th\u1eadm ch\u00ed l\u00e0 c\u00e1c thu\u1ed9c t\u00ednh ph\u00e2n lo\u1ea1i (classification) nh\u01b0 \u0111i\u1ec3m \u0111\u00f3 thu\u1ed9c v\u1ec1 m\u1eb7t \u0111\u1ea5t, c\u00e2y c\u1ed1i, t\u00f2a nh\u00e0, hay ph\u01b0\u01a1ng ti\u1ec7n giao th\u00f4ng. Ch\u00ednh nh\u1eefng th\u00f4ng tin \u0111a d\u1ea1ng n\u00e0y bi\u1ebfn Point Cloud t\u1eeb m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m v\u00f4 tri th\u00e0nh m\u1ed9t m\u00f4 h\u00ecnh 3D s\u1ed1ng \u0111\u1ed9ng, chi ti\u1ebft v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch s\u00e2u s\u1eafc, m\u1edf ra v\u00f4 v\u00e0n \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c nhau, t\u1eeb x\u00e2y d\u1ef1ng, s\u1ea3n xu\u1ea5t, \u0111\u1ebfn nghi\u00ean c\u1ee9u khoa h\u1ecdc.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Khai_niem_co_ban_ve_Point_Cloud_%E2%80%93_%E2%80%9Cdam_may_diem%E2%80%9D\"><\/span>Kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 Point Cloud \u2013 &#8220;\u0111\u00e1m m\u00e2y \u0111i\u1ec3m&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>V\u1ec1 c\u1ed1t l\u00f5i, Point Cloud l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n s\u1ed1 h\u00f3a c\u1ee7a th\u1ef1c t\u1ebf v\u1eadt l\u00fd \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch thu th\u1eadp h\u00e0ng tri\u1ec7u, \u0111\u00f4i khi h\u00e0ng t\u1ef7, c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u ri\u00eang l\u1ebb trong kh\u00f4ng gian 3D. M\u1ed7i \u0111i\u1ec3m n\u00e0y c\u00f3 m\u1ed9t v\u1ecb tr\u00ed duy nh\u1ea5t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi ba t\u1ecda \u0111\u1ed9: X, Y, v\u00e0 Z. V\u00ed d\u1ee5, trong m\u1ed9t m\u00f4 h\u00ecnh Point Cloud c\u1ee7a m\u1ed9t t\u00f2a nh\u00e0, m\u1ed7i \u0111i\u1ec3m c\u00f3 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t ph\u1ea7n nh\u1ecf c\u1ee7a b\u1ee9c t\u01b0\u1eddng, s\u00e0n nh\u00e0, ho\u1eb7c c\u1eeda s\u1ed5. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 c\u00e1c \u0111i\u1ec3m n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi nhau, m\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t &#8220;\u0111\u00e1m m\u00e2y&#8221; d\u00e0y \u0111\u1eb7c \u0111\u1ebfn m\u1ee9c khi nh\u00ecn b\u1eb1ng m\u1eaft th\u01b0\u1eddng ho\u1eb7c qua ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng, ch\u00fang t\u1ea1o ra h\u00ecnh \u1ea3nh nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng ban \u0111\u1ea7u.<\/p>\r\n\r\n\r\n\r\n<p>Qu\u00e1 tr\u00ecnh t\u1ea1o ra Point Cloud th\u01b0\u1eddng th\u00f4ng qua c\u00e1c c\u00f4ng ngh\u1ec7 qu\u00e9t 3D nh\u01b0 laser scanning (LiDAR), photogrammetry (ch\u1ee5p \u1ea3nh k\u1ebft h\u1ee3p ph\u1ea7n m\u1ec1m \u0111\u1ec3 t\u1ea1o m\u00f4 h\u00ecnh 3D), ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 c\u00e1c c\u1ea3m bi\u1ebfn \u0111\u1ed9 s\u00e2u nh\u01b0 Kinect. M\u1ed7i c\u00f4ng ngh\u1ec7 n\u00e0y c\u00f3 nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau nh\u01b0ng \u0111\u1ec1u h\u01b0\u1edbng t\u1edbi m\u1ed9t m\u1ee5c ti\u00eau chung: thu th\u1eadp m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u v\u1edbi t\u1ecda \u0111\u1ed9 ch\u00ednh x\u00e1c. \u0110\u1ed9 ch\u00ednh x\u00e1c v\u00e0 m\u1eadt \u0111\u1ed9 c\u1ee7a c\u00e1c \u0111i\u1ec3m trong Point Cloud l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t quy\u1ebft \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 chi ti\u1ebft c\u1ee7a m\u00f4 h\u00ecnh 3D \u0111\u01b0\u1ee3c t\u1ea1o ra. M\u1ed9t \u0111\u00e1m m\u00e2y \u0111i\u1ec3m d\u00e0y \u0111\u1eb7c s\u1ebd cung c\u1ea5p nhi\u1ec1u th\u00f4ng tin h\u01a1n v\u00e0 cho ph\u00e9p t\u00e1i t\u1ea1o h\u00ecnh d\u1ea1ng \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ed9t c\u00e1ch trung th\u1ef1c h\u01a1n, nh\u01b0ng c\u0169ng \u0111\u00f2i h\u1ecfi dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef l\u1edbn h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd m\u1ea1nh m\u1ebd h\u01a1n.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cac_thanh_phan_tao_nen_mot_tap_du_lieu_Point_Cloud_hoan_chinh\"><\/span>C\u00e1c th\u00e0nh ph\u1ea7n t\u1ea1o n\u00ean m\u1ed9t t\u1eadp d\u1eef li\u1ec7u Point Cloud ho\u00e0n ch\u1ec9nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>M\u1ed9t t\u1eadp\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf t\u1ecda \u0111\u1ed9 (X, Y, Z). \u0110\u1ec3 th\u1ef1c s\u1ef1 h\u1eefu \u00edch v\u00e0 cung c\u1ea5p c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u1ec1 m\u00f4i tr\u01b0\u1eddng \u0111\u01b0\u1ee3c qu\u00e9t, m\u1ed7i \u0111i\u1ec3m trong \u0111\u00e1m m\u00e2y th\u01b0\u1eddng bao g\u1ed3m m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c thu\u1ed9c t\u00ednh b\u1ed5 sung, l\u00e0m t\u0103ng \u0111\u00e1ng k\u1ec3 gi\u00e1 tr\u1ecb c\u1ee7a n\u00f3. Nh\u1eefng thu\u1ed9c t\u00ednh ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u00f3 th\u1ec3 k\u1ec3 \u0111\u1ebfn l\u00e0 m\u00e0u s\u1eafc v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1.<\/p>\r\n\r\n\r\n\r\n<p>M\u00e0u s\u1eafc (RGB &#8211; Red, Green, Blue) \u0111\u01b0\u1ee3c g\u00e1n cho m\u1ed7i \u0111i\u1ec3m, cho ph\u00e9p m\u00f4 h\u00ecnh Point Cloud hi\u1ec3n th\u1ecb v\u1edbi m\u00e0u s\u1eafc gi\u1ed1ng nh\u01b0 th\u1ef1c t\u1ebf, mang l\u1ea1i tr\u1ea3i nghi\u1ec7m tr\u1ef1c quan h\u01a1n v\u00e0 gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c b\u1ec1 m\u1eb7t, v\u1eadt li\u1ec7u kh\u00e1c nhau. Th\u00f4ng tin m\u00e0u s\u1eafc th\u01b0\u1eddng \u0111\u01b0\u1ee3c thu th\u1eadp \u0111\u1ed3ng th\u1eddi t\u1eeb camera t\u00edch h\u1ee3p tr\u00ean m\u00e1y qu\u00e9t ho\u1eb7c th\u00f4ng qua qu\u00e1 tr\u00ecnh \u00e1nh x\u1ea1 \u1ea3nh ch\u1ee5p. C\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1 (Intensity) l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb s\u1ed1 bi\u1ec3u th\u1ecb s\u1ee9c m\u1ea1nh c\u1ee7a t\u00edn hi\u1ec7u laser \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i c\u1ea3m bi\u1ebfn. Gi\u00e1 tr\u1ecb n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o v\u1eadt li\u1ec7u, m\u00e0u s\u1eafc v\u00e0 g\u00f3c ph\u1ea3n x\u1ea1 c\u1ee7a b\u1ec1 m\u1eb7t, cung c\u1ea5p th\u00f4ng tin qu\u00fd gi\u00e1 v\u1ec1 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng, ngay c\u1ea3 khi kh\u00f4ng c\u00f3 th\u00f4ng tin m\u00e0u s\u1eafc. V\u00ed d\u1ee5, kim lo\u1ea1i th\u01b0\u1eddng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1 cao h\u01a1n g\u1ed7. Ngo\u00e0i ra,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0c\u00f3 th\u1ec3 ch\u1ee9a th\u00f4ng tin v\u1ec1 th\u1eddi gian bay (return number, number of returns) cho c\u00e1c tia laser ph\u00e1t ra nhi\u1ec1u l\u1ea7n ph\u1ea3n x\u1ea1 t\u1eeb c\u00e1c b\u1ec1 m\u1eb7t kh\u00e1c nhau (v\u00ed d\u1ee5 xuy\u00ean qua t\u00e1n l\u00e1), ho\u1eb7c th\u00f4ng tin ph\u00e2n lo\u1ea1i (classification) nh\u01b0 \u0111\u1ea5t, c\u00e2y c\u1ed1i, t\u00f2a nh\u00e0, \u0111\u01b0\u1eddng giao th\u00f4ng, gi\u00fap d\u1ec5 d\u00e0ng l\u1ecdc v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u cho c\u00e1c m\u1ee5c \u0111\u00edch c\u1ee5 th\u1ec3. S\u1ef1 phong ph\u00fa c\u1ee7a c\u00e1c thu\u1ed9c t\u00ednh n\u00e0y bi\u1ebfn\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0th\u00e0nh m\u1ed9t &#8220;ng\u00e2n h\u00e0ng&#8221; th\u00f4ng tin kh\u00f4ng gian 3D m\u1ea1nh m\u1ebd, c\u00f3 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 nhi\u1ec1u lo\u1ea1i ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tu_qua_trinh_thu_thap_den_su_hinh_thanh_du_lieu_Point_Cloud\"><\/span>T\u1eeb qu\u00e1 tr\u00ecnh thu th\u1eadp \u0111\u1ebfn s\u1ef1 h\u00ecnh th\u00e0nh d\u1eef li\u1ec7u Point Cloud<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh m\u1ed9t t\u1eadp\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0ho\u00e0n ch\u1ec9nh l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c b\u01b0\u1edbc c\u00f4ng ngh\u1ec7 cao, b\u1eaft \u0111\u1ea7u t\u1eeb vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u th\u00f4 v\u00e0 k\u1ebft th\u00fac b\u1eb1ng m\u1ed9t m\u00f4 h\u00ecnh 3D c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c. B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean v\u00e0 quan tr\u1ecdng nh\u1ea5t l\u00e0 thu th\u1eadp d\u1eef li\u1ec7u, th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi c\u00e1c thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng nh\u01b0 m\u00e1y qu\u00e9t laser 3D (TLS, HLS \u2013 Handheld Laser Scanner, MLS \u2013 Mobile Laser Scanner, UAS\/UAV LiDAR), ho\u1eb7c b\u1eb1ng k\u1ef9 thu\u1eadt ch\u1ee5p \u1ea3nh l\u1eadp th\u1ec3 (photogrammetry) s\u1eed d\u1ee5ng m\u00e1y \u1ea3nh ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 ph\u1ea7n m\u1ec1m x\u1eed l\u00fd \u1ea3nh. M\u1ed7i ph\u01b0\u01a1ng ph\u00e1p c\u00f3 nh\u1eefng \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang v\u1ec1 t\u1ed1c \u0111\u1ed9, \u0111\u1ed9 ch\u00ednh x\u00e1c, ph\u1ea1m vi v\u00e0 chi ph\u00ed. V\u00ed d\u1ee5, m\u00e1y qu\u00e9t laser mang l\u1ea1i \u0111\u1ed9 ch\u00ednh x\u00e1c cao ngay c\u1ea3 trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng y\u1ebfu, trong khi photogrammetry l\u1ea1i n\u1ed5i b\u1eadt v\u1edbi kh\u1ea3 n\u0103ng thu th\u1eadp m\u00e0u s\u1eafc s\u1ed1ng \u0111\u1ed9ng v\u00e0 chi ph\u00ed thi\u1ebft b\u1ecb ban \u0111\u1ea7u th\u1ea5p h\u01a1n.<\/p>\r\n\r\n\r\n\r\n<p>Sau khi d\u1eef li\u1ec7u th\u00f4 \u0111\u01b0\u1ee3c thu th\u1eadp (th\u01b0\u1eddng d\u01b0\u1edbi d\u1ea1ng c\u00e1c t\u1ec7p tin l\u1edbn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c b\u1ed9 \u1ea3nh), b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 x\u1eed l\u00fd s\u01a1 b\u1ed9. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c \u0111\u0103ng k\u00fd (registration) \u2013 t\u1ee9c l\u00e0 c\u0103n ch\u1ec9nh v\u00e0 gh\u00e9p n\u1ed1i c\u00e1c b\u1ea3n qu\u00e9t ri\u00eang l\u1ebb ho\u1eb7c c\u00e1c b\u1ed9 \u1ea3nh th\u00e0nh m\u1ed9t h\u1ec7 t\u1ecda \u0111\u1ed9 chung \u0111\u1ec3 t\u1ea1o ra m\u1ed9t \u0111\u00e1m m\u00e2y \u0111i\u1ec3m th\u1ed1ng nh\u1ea5t kh\u00f4ng b\u1ecb tr\u00f9ng l\u1eb7p hay sai l\u1ec7ch. Ti\u1ebfp theo l\u00e0 c\u00e1c b\u01b0\u1edbc l\u1ecdc nhi\u1ec5u (noise reduction), lo\u1ea1i b\u1ecf c\u00e1c \u0111i\u1ec3m kh\u00f4ng mong mu\u1ed1n, v\u00e0 chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u. T\u00f9y thu\u1ed9c v\u00e0o m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a d\u1ef1 \u00e1n,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch, n\u00e9n, v\u00e0 sau \u0111\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp ho\u1eb7c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00e1c m\u00f4 h\u00ecnh l\u01b0\u1edbi (mesh models), b\u1ec1 m\u1eb7t (surfaces), ho\u1eb7c \u0111\u1ed1i t\u01b0\u1ee3ng 3D (v\u00ed d\u1ee5 nh\u01b0 t\u01b0\u1eddng, c\u1ed9t, \u1ed1ng d\u1eabn) \u0111\u1ec3 t\u00edch h\u1ee3p v\u00e0o c\u00e1c ph\u1ea7n m\u1ec1m thi\u1ebft k\u1ebf v\u00e0 m\u00f4 h\u00ecnh h\u00f3a (CAD\/BIM). Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 d\u1eef li\u1ec7u v\u00e0 k\u1ef9 n\u0103ng s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m, nh\u01b0ng k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng l\u00e0 m\u1ed9t b\u1ea3n sao s\u1ed1 c\u1ee7a th\u1ebf gi\u1edbi th\u1ef1c, m\u1edf ra v\u00f4 v\u00e0n kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tai_sao_Point_Cloud_khong_chi_la_mot_tap_hop_cac_diem\"><\/span>T\u1ea1i sao Point Cloud kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>M\u1eb7c d\u00f9 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;\u0111\u00e1m m\u00e2y \u0111i\u1ec3m&#8221; v\u00e0 v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m X, Y, Z r\u1eddi r\u1ea1c,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>th\u1ef1c s\u1ef1 v\u01b0\u1ee3t xa \u0111\u1ecbnh ngh\u0129a \u0111\u01a1n thu\u1ea7n \u0111\u00f3, tr\u1edf th\u00e0nh m\u1ed9t ngu\u1ed3n th\u00f4ng tin kh\u00f4ng gian 3D v\u00f4 c\u00f9ng phong ph\u00fa v\u00e0 \u0111a chi\u1ec1u. \u0110i\u1ec1u l\u00e0m cho Point Cloud m\u1ea1nh m\u1ebd kh\u00f4ng ch\u1ec9 l\u00e0 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c t\u1ecda \u0111\u1ed9 m\u00e0 c\u00f2n l\u00e0 s\u1ef1 t\u00edch h\u1ee3p c\u1ee7a c\u00e1c thu\u1ed9c t\u00ednh phi h\u00ecnh h\u1ecdc v\u00e0 kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch s\u00e2u s\u1eafc t\u1eeb d\u1eef li\u1ec7u \u0111\u00f3. M\u1ed7i \u0111i\u1ec3m th\u01b0\u1eddng mang theo c\u00e1c gi\u00e1 tr\u1ecb nh\u01b0 m\u00e0u s\u1eafc (RGB), c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1 laser (intensity), th\u00f4ng tin v\u1ec1 l\u1edbp \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c g\u00e1n (classification), v\u00e0 \u0111\u00f4i khi c\u1ea3 th\u00f4ng tin v\u1ec1 th\u1eddi gian (timestamp). Nh\u1eefng thu\u1ed9c t\u00ednh n\u00e0y cho ph\u00e9p ch\u00fang ta kh\u00f4ng ch\u1ec9 nh\u00ecn th\u1ea5y h\u00ecnh d\u1ea1ng c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 m\u00e0 c\u00f2n hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1eb7c t\u00ednh b\u1ec1 m\u1eb7t, v\u1eadt li\u1ec7u, v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh n\u00f3. V\u00ed d\u1ee5, c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1 c\u00f3 th\u1ec3 gi\u00fap ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 m\u00e0u s\u1eafc t\u01b0\u01a1ng t\u1ef1, trong khi ph\u00e2n lo\u1ea1i gi\u00fap t\u1ef1 \u0111\u1ed9ng t\u00e1ch bi\u1ec7t c\u00e2y c\u1ed1i kh\u1ecfi t\u00f2a nh\u00e0.<\/p>\r\n\r\n\r\n\r\n<p>H\u01a1n n\u1eefa, ti\u1ec1m n\u0103ng th\u1ef1c s\u1ef1 c\u1ee7a\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0n\u1eb1m \u1edf kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh c\u00e1c m\u00f4 h\u00ecnh c\u00f3 \u00fd ngh\u0129a v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c trong c\u00e1c quy tr\u00ecnh l\u00e0m vi\u1ec7c kh\u00e1c nhau. T\u1eeb Point Cloud, ch\u00fang ta c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c b\u1ea3n v\u1ebd 2D ch\u00ednh x\u00e1c, c\u00e1c m\u00f4 h\u00ecnh 3D d\u1ea1ng l\u01b0\u1edbi (mesh) ho\u1eb7c m\u00f4 h\u00ecnh b\u1ec1 m\u1eb7t NURBS \u0111\u1ec3 s\u1eed d\u1ee5ng trong thi\u1ebft k\u1ebf \u0111\u1ed3 h\u1ecda ho\u1eb7c s\u1ea3n xu\u1ea5t. Quan tr\u1ecdng h\u01a1n, n\u00f3 l\u00e0 n\u1ec1n t\u1ea3ng cho vi\u1ec7c t\u1ea1o ra c\u00e1c m\u00f4 h\u00ecnh BIM (Building Information Modeling) &#8220;th\u1ef1c t\u1ebf&#8221;, n\u01a1i m\u1ed7i \u0111i\u1ec3m d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng th\u00f4ng minh c\u00f3 th\u00f4ng tin thu\u1ed9c t\u00ednh phong ph\u00fa, ph\u1ee5c v\u1ee5 cho to\u00e0n b\u1ed9 v\u00f2ng \u0111\u1eddi c\u1ee7a m\u1ed9t d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng. Point Cloud c\u0169ng l\u00e0 y\u1ebfu t\u1ed1 c\u1ed1t l\u00f5i trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf \u1ea3o (VR) v\u00e0 th\u1ef1c t\u1ebf t\u0103ng c\u01b0\u1eddng (AR), n\u01a1i n\u00f3 cung c\u1ea5p khung tham chi\u1ebfu ch\u00ednh x\u00e1c cho vi\u1ec7c ph\u1ee7 l\u1edbp th\u00f4ng tin k\u1ef9 thu\u1eadt s\u1ed1 l\u00ean m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd. V\u00ec v\u1eady,\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m; n\u00f3 l\u00e0 m\u1ed9t c\u00e1nh c\u1eeda m\u1edf ra kh\u1ea3 n\u0103ng t\u00e1i t\u1ea1o, ph\u00e2n t\u00edch v\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi th\u1ebf gi\u1edbi th\u1ef1c trong kh\u00f4ng gian k\u1ef9 thu\u1eadt s\u1ed1, bi\u1ebfn n\u00f3 th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 \u0111\u1ed5i m\u1edbi kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cac_dinh_dang_du_lieu_Point_Cloud_pho_bien\"><\/span>C\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u Point Cloud ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Th\u1ebf gi\u1edbi c\u1ee7a\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0kh\u00f4ng ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf b\u1ea3n th\u00e2n kh\u00e1i ni\u1ec7m &#8220;\u0111\u00e1m m\u00e2y \u0111i\u1ec3m&#8221; m\u00e0 c\u00f2n m\u1edf r\u1ed9ng ra v\u1edbi m\u1ed9t lo\u1ea1t c\u00e1c \u0111\u1ecbnh d\u1ea1ng t\u1ec7p tin \u0111a d\u1ea1ng, m\u1ed7i \u0111\u1ecbnh d\u1ea1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ph\u1ee5c v\u1ee5 c\u00e1c m\u1ee5c \u0111\u00edch, ph\u1ea7n m\u1ec1m v\u00e0 quy tr\u00ecnh l\u00e0m vi\u1ec7c kh\u00e1c nhau. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng ph\u00f9 h\u1ee3p c\u00f3 \u00fd ngh\u0129a s\u00e2u s\u1eafc \u0111\u1ed1i v\u1edbi hi\u1ec7u qu\u1ea3 c\u1ee7a to\u00e0n b\u1ed9 d\u1ef1 \u00e1n, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u00edch th\u01b0\u1edbc t\u1ec7p, t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd, kh\u1ea3 n\u0103ng b\u1ea3o to\u00e0n th\u00f4ng tin chi ti\u1ebft v\u00e0 m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 ph\u1ea7n m\u1ec1m. M\u1ed9t \u0111\u1ecbnh d\u1ea1ng t\u1ed1t c\u00f3 th\u1ec3 gi\u00fap ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 th\u1eddi gian v\u00e0 chi ph\u00ed, trong khi m\u1ed9t l\u1ef1a ch\u1ecdn sai l\u1ea7m c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng r\u1eafc r\u1ed1i kh\u00f4ng mong mu\u1ed1n, t\u1eeb m\u1ea5t m\u00e1t d\u1eef li\u1ec7u \u0111\u1ebfn s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng.<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" class=\"lazyload wp-image-31679\" src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-1024x683.jpg\" data-orig-src=\"https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-1024x683.jpg\" alt=\"c\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u point cloud\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271024%27%20height%3D%27683%27%20viewBox%3D%270%200%201024%20683%27%3E%3Crect%20width%3D%271024%27%20height%3D%27683%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-200x133.jpg 200w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-300x200.jpg 300w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-400x267.jpg 400w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-600x400.jpg 600w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-768x512.jpg 768w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-800x533.jpg 800w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-1024x683.jpg 1024w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1-1200x800.jpg 1200w, https:\/\/vmts.ch\/wp-content\/uploads\/2025\/07\/cac-dinh-dang-du-lieu-point-cloud-1.jpg 1380w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\r\n\r\n\r\n\r\n<p>Ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o kh\u00e1m ph\u00e1 c\u00e1c \u0111\u1ecbnh d\u1ea1ng\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay, t\u1eeb nh\u1eefng \u0111\u1ecbnh d\u1ea1ng \u0111\u1ed9c quy\u1ec1n c\u1ee7a c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m cho \u0111\u1ebfn c\u00e1c ti\u00eau chu\u1ea9n m\u1edf \u0111\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng ch\u1ea5p nh\u1eadn r\u1ed9ng r\u00e3i. M\u1ed7i \u0111\u1ecbnh d\u1ea1ng s\u1ebd \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt, \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m, c\u0169ng nh\u01b0 c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a ch\u00fang. Vi\u1ec7c n\u1eafm v\u1eefng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t khi l\u00e0m vi\u1ec7c v\u1edbi\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0m\u00e0 c\u00f2n gi\u00fap h\u1ecd t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh l\u00e0m vi\u1ec7c, \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u trong su\u1ed1t c\u00e1c giai \u0111o\u1ea1n c\u1ee7a d\u1ef1 \u00e1n.<\/p>\r\n\r\n\r\n\r\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng t\u1ed5ng quan v\u1ec1 c\u00e1c \u0111\u1ecbnh d\u1ea1ng\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0ph\u1ed5 bi\u1ebfn:<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table class=\"has-awb-color-2-background-color has-background has-fixed-layout\">\r\n<thead>\r\n<tr>\r\n<th>\u0110\u1ecbnh d\u1ea1ng<\/th>\r\n<th>\u0110\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt<\/th>\r\n<th>\u01afu \u0111i\u1ec3m<\/th>\r\n<th>Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\r\n<th>\u1ee8ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td><strong>LAS \/ LAZ<\/strong><\/td>\r\n<td>\u0110\u1ecbnh d\u1ea1ng ti\u00eau chu\u1ea9n ng\u00e0nh, l\u01b0u tr\u1eef \u0111\u1ea7y \u0111\u1ee7 thu\u1ed9c t\u00ednh (t\u1ecda \u0111\u1ed9, m\u00e0u s\u1eafc, c\u01b0\u1eddng \u0111\u1ed9, th\u1eddi gian ph\u1ea3n x\u1ea1, ph\u00e2n lo\u1ea1i). LAZ l\u00e0 phi\u00ean b\u1ea3n n\u00e9n c\u1ee7a LAS.<\/td>\r\n<td>Ti\u00eau chu\u1ea9n m\u1edf, \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i b\u1edfi h\u1ea7u h\u1ebft c\u00e1c ph\u1ea7n m\u1ec1m CAD, GIS, x\u1eed l\u00fd Point Cloud. B\u1ea3o to\u00e0n th\u00f4ng tin phong ph\u00fa. LAZ gi\u1ea3m k\u00edch th\u01b0\u1edbc file \u0111\u00e1ng k\u1ec3 m\u00e0 kh\u00f4ng m\u1ea5t d\u1eef li\u1ec7u.<\/td>\r\n<td>File LAS c\u00f3 th\u1ec3 r\u1ea5t l\u1edbn n\u1ebfu kh\u00f4ng n\u00e9n. \u0110\u00f4i khi vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i c\u00e1c \u0111\u1ecbnh d\u1ea1ng \u0111\u1ed9c quy\u1ec1n sang LAS\/LAZ c\u00f3 th\u1ec3 m\u1ea5t m\u00e1t m\u1ed9t s\u1ed1 thu\u1ed9c t\u00ednh chuy\u00ean bi\u1ec7t.<\/td>\r\n<td>Kh\u1ea3o s\u00e1t \u0111\u1ecba h\u00ecnh, LiDAR t\u1eeb m\u00e1y bay\/UAV, GIS, quy ho\u1ea1ch \u0111\u00f4 th\u1ecb, l\u00e2m nghi\u1ec7p, qu\u1ea3n l\u00fd t\u00e0i s\u1ea3n, ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng x\u00e2y d\u1ef1ng.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>E57<\/strong><\/td>\r\n<td>\u0110\u1ecbnh d\u1ea1ng m\u1edf, trung l\u1eadp, \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi ASTM. T\u1ed1i \u01b0u cho vi\u1ec7c trao \u0111\u1ed5i d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau.<\/td>\r\n<td>\u0110a n\u1ec1n t\u1ea3ng, \u0111\u1ed9c l\u1eadp v\u1edbi nh\u00e0 cung c\u1ea5p ph\u1ea7n m\u1ec1m\/thi\u1ebft b\u1ecb. H\u1ed7 tr\u1ee3 d\u1eef li\u1ec7u \u0111i\u1ec3m, h\u00ecnh \u1ea3nh to\u00e0n c\u1ea3nh (pano), th\u00f4ng tin metadata \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a t\u1eebng b\u1ea3n qu\u00e9t. T\u1ed1t cho l\u01b0u tr\u1eef v\u00e0 trao \u0111\u1ed5i d\u1eef li\u1ec7u qu\u00e9t th\u00f4.<\/td>\r\n<td>K\u00edch th\u01b0\u1edbc file l\u1edbn do l\u01b0u tr\u1eef \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng tin chi ti\u1ebft, th\u01b0\u1eddng kh\u00f4ng t\u1ed1i \u01b0u cho vi\u1ec7c x\u1eed l\u00fd ho\u1eb7c hi\u1ec3n th\u1ecb tr\u1ef1c ti\u1ebfp v\u1edbi s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m l\u1edbn trong c\u00e1c ph\u1ea7n m\u1ec1m thi\u1ebft k\u1ebf.<\/td>\r\n<td>Trao \u0111\u1ed5i d\u1eef li\u1ec7u Point Cloud gi\u1eefa c\u00e1c ph\u1ea7n m\u1ec1m\/thi\u1ebft b\u1ecb kh\u00e1c nhau, l\u01b0u tr\u1eef d\u1eef li\u1ec7u qu\u00e9t g\u1ed1c, ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec m\u00e1y qu\u00e9t.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>RCS \/ RCP<\/strong><\/td>\r\n<td>\u0110\u1ecbnh d\u1ea1ng \u0111\u1ed9c quy\u1ec1n c\u1ee7a Autodesk ReCap, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t trong m\u00f4i tr\u01b0\u1eddng Autodesk.<\/td>\r\n<td>T\u00edch h\u1ee3p s\u00e2u r\u1ed9ng v\u00e0 hi\u1ec7u qu\u1ea3 v\u1edbi c\u00e1c ph\u1ea7n m\u1ec1m c\u1ee7a Autodesk (AutoCAD, Revit, Inventor, Navisworks). X\u1eed l\u00fd v\u00e0 hi\u1ec3n th\u1ecb nhanh ch\u00f3ng\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0l\u1edbn.<\/td>\r\n<td>Ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t trong h\u1ec7 sinh th\u00e1i Autodesk. Kh\u00f3 kh\u0103n khi chia s\u1ebb v\u1edbi ng\u01b0\u1eddi d\u00f9ng ph\u1ea7n m\u1ec1m kh\u00e1c y\u00eau c\u1ea7u chuy\u1ec3n \u0111\u1ed5i \u0111\u1ecbnh d\u1ea1ng.<\/td>\r\n<td>BIM (Building Information Modeling), thi\u1ebft k\u1ebf c\u01a1 kh\u00ed, qu\u1ea3n l\u00fd d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng, ki\u1ec3m tra c\u00f4ng tr\u00ecnh, thi\u1ebft k\u1ebf nh\u00e0 m\u00e1y, quy tr\u00ecnh l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m Autodesk.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>PTS<\/strong><\/td>\r\n<td>\u0110\u1ecbnh d\u1ea1ng text \u0111\u01a1n gi\u1ea3n, m\u1ed7i d\u00f2ng l\u00e0 m\u1ed9t \u0111i\u1ec3m v\u1edbi t\u1ecda \u0111\u1ed9 v\u00e0 \u0111\u00f4i khi l\u00e0 th\u00eam m\u00e0u s\u1eafc\/c\u01b0\u1eddng \u0111\u1ed9.<\/td>\r\n<td>D\u1ec5 \u0111\u1ecdc, d\u1ec5 ch\u1ec9nh s\u1eeda b\u1eb1ng c\u00e1c c\u00f4ng c\u1ee5 text \u0111\u01a1n gi\u1ea3n. T\u00ednh linh ho\u1ea1t cao trong vi\u1ec7c t\u00f9y ch\u1ec9nh c\u00e1c c\u1ed9t d\u1eef li\u1ec7u.<\/td>\r\n<td>K\u00edch th\u01b0\u1edbc file r\u1ea5t l\u1edbn do l\u00e0 text kh\u00f4ng n\u00e9n. Th\u1eddi gian t\u1ea3i v\u00e0 x\u1eed l\u00fd ch\u1eadm. Kh\u00f4ng ch\u1ee9a thu\u1ed9c t\u00ednh metadata, th\u00f4ng tin v\u1ec1 h\u1ec7 t\u1ecda \u0111\u1ed9 hay c\u00e1c l\u1edbp d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p.<\/td>\r\n<td>D\u00f9ng cho c\u00e1c d\u1ef1 \u00e1n nh\u1ecf, d\u1eef li\u1ec7u \u00edt \u0111i\u1ec3m, ho\u1eb7c khi c\u1ea7n ki\u1ec3m tra\/ch\u1ec9nh s\u1eeda \u0111i\u1ec3m ri\u00eang l\u1ebb. Trao \u0111\u1ed5i d\u1eef li\u1ec7u c\u01a1 b\u1ea3n gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng kh\u00f4ng c\u00f3 plugin \u0111\u1eb7c bi\u1ec7t.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>XYZ<\/strong><\/td>\r\n<td>\u0110\u1ecbnh d\u1ea1ng text c\u01a1 b\u1ea3n nh\u1ea5t, ch\u1ec9 ch\u1ee9a t\u1ecda \u0111\u1ed9 X, Y, Z. \u0110\u00f4i khi c\u00f3 th\u00eam 3 c\u1ed9t RGB.<\/td>\r\n<td>C\u1ef1c k\u1ef3 \u0111\u01a1n gi\u1ea3n, d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c \u0111\u1ecdc b\u1edfi m\u1ecdi ph\u1ea7n m\u1ec1m c\u00f3 th\u1ec3 \u0111\u1ecdc text. Kh\u00f4ng y\u00eau c\u1ea7u \u0111\u1ecbnh d\u1ea1ng ph\u1ee9c t\u1ea1p.<\/td>\r\n<td>K\u00edch th\u01b0\u1edbc file l\u1edbn, thi\u1ebfu c\u00e1c thu\u1ed9c t\u00ednh quan tr\u1ecdng (c\u01b0\u1eddng \u0111\u1ed9, ph\u00e2n lo\u1ea1i, metadata). Kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng n\u00e9n.<\/td>\r\n<td>Trao \u0111\u1ed5i d\u1eef li\u1ec7u 3D th\u00f4, \u0111\u01a1n gi\u1ea3n khi kh\u00f4ng y\u00eau c\u1ea7u th\u00f4ng tin chi ti\u1ebft ho\u1eb7c khi c\u1ea7n t\u01b0\u01a1ng th\u00edch \u0111a n\u1ec1n t\u1ea3ng t\u1ed1i \u0111a. Ch\u1ee7 y\u1ebfu cho d\u1eef li\u1ec7u \u0111\u1ea7u ra t\u1eeb c\u00e1c thu\u1eadt to\u00e1n \u0111\u01a1n gi\u1ea3n, ho\u1eb7c vi\u1ec7c h\u00ecnh dung c\u01a1 b\u1ea3n.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td><strong>PLY<\/strong><\/td>\r\n<td>\u0110\u1ecbnh d\u1ea1ng \u0111a gi\u00e1c (Polygon File Format) c\u0169ng c\u00f3 th\u1ec3 ch\u1ee9a Point Cloud v\u1edbi m\u00e0u s\u1eafc v\u00e0 thu\u1ed9c t\u00ednh.<\/td>\r\n<td>Linh ho\u1ea1t, c\u00f3 th\u1ec3 l\u01b0u tr\u1eef Point Cloud, mesh, v\u00e0 c\u00e1c thu\u1ed9c t\u00ednh t\u00f9y ch\u1ec9nh. H\u1ed7 tr\u1ee3 c\u1ea3 \u0111\u1ecbnh d\u1ea1ng ASCII v\u00e0 binary. \u0110\u01b0\u1ee3c c\u1ed9ng \u0111\u1ed3ng nghi\u00ean c\u1ee9u v\u00e0 \u0111\u1ed3 h\u1ecda 3D \u01b0a chu\u1ed9ng.<\/td>\r\n<td>Kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ecbnh d\u1ea1ng chuy\u00ean d\u1ee5ng cho Point Cloud l\u1edbn n\u00ean c\u00f3 th\u1ec3 kh\u00f4ng t\u1ed1i \u01b0u b\u1eb1ng LAS\/LAZ v\u1ec1 n\u00e9n v\u00e0 c\u00e1c thu\u1ed9c t\u00ednh chuy\u00ean bi\u1ec7t c\u1ee7a lidar.<\/td>\r\n<td>Nghi\u00ean c\u1ee9u h\u1ecdc thu\u1eadt, \u0111\u1ed3 h\u1ecda m\u00e1y t\u00ednh, in 3D, m\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed1i t\u01b0\u1ee3ng, qu\u00e9t v\u1eadt th\u1ec3 nh\u1ecf, x\u1eed l\u00fd h\u00ecnh \u1ea3nh 3D.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_dang_LAS_LAZ_%E2%80%93_Chuan_muc_trong_nganh_Land_Surveying\"><\/span>\u0110\u1ecbnh d\u1ea1ng LAS \/ LAZ \u2013 Chu\u1ea9n m\u1ef1c trong ng\u00e0nh Land Surveying<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>\u0110\u1ecbnh d\u1ea1ng LAS (LASer) v\u00e0 phi\u00ean b\u1ea3n n\u00e9n LAZ c\u1ee7a n\u00f3 l\u00e0 nh\u1eefng &#8220;con ng\u1ef1a chi\u1ebfn&#8221; kh\u00f4ng th\u1ec3 thi\u1ebfu trong th\u1ebf gi\u1edbi\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng kh\u1ea3o s\u00e1t \u0111\u1ecba h\u00ecnh, LiDAR v\u00e0 GIS. \u0110\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0 duy tr\u00ec b\u1edfi Hi\u1ec7p h\u1ed9i \u0110o \u0111\u1ea1c v\u00e0 C\u1eadp nh\u1eadt B\u1ea3n \u0111\u1ed3 Hoa K\u1ef3 (ASPRS), LAS \u0111\u00e3 nhanh ch\u00f3ng tr\u1edf th\u00e0nh m\u1ed9t ti\u00eau chu\u1ea9n m\u1edf \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn v\u00e0 \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i. \u0110i\u1ec3m m\u1ea1nh l\u1edbn nh\u1ea5t c\u1ee7a LAS kh\u00f4ng ch\u1ec9 l\u00e0 s\u1ef1 ph\u1ed5 bi\u1ebfn m\u00e0 c\u00f2n \u1edf kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef m\u1ed9t l\u01b0\u1ee3ng l\u1edbn th\u00f4ng tin phong ph\u00fa cho m\u1ed7i \u0111i\u1ec3m. Ngo\u00e0i t\u1ecda \u0111\u1ed9 X, Y, Z c\u01a1 b\u1ea3n, LAS c\u00f2n c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c thu\u1ed9c t\u00ednh quan tr\u1ecdng kh\u00e1c nh\u01b0 gi\u00e1 tr\u1ecb c\u01b0\u1eddng \u0111\u1ed9 ph\u1ea3n x\u1ea1 laser (intensity), th\u00f4ng tin m\u00e0u s\u1eafc (RGB), th\u1eddi gian ph\u1ea3n x\u1ea1 (return number), g\u00f3c qu\u00e9t (scan angle), v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i \u0111i\u1ec3m (classification). H\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng g\u00e1n nh\u00e3n cho t\u1eebng \u0111i\u1ec3m, v\u00ed d\u1ee5 nh\u01b0 m\u1eb7t \u0111\u1ea5t, c\u00e2y c\u1ed1i, t\u00f2a nh\u00e0, \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n, gi\u00fap vi\u1ec7c l\u1ecdc v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u tr\u1edf n\u00ean hi\u1ec7u qu\u1ea3 h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\r\n\r\n\r\n\r\n<p>Phi\u00ean b\u1ea3n LAZ l\u00e0 m\u1ed9t \u0111\u1ecbnh d\u1ea1ng n\u00e9n c\u1ee7a LAS, s\u1eed d\u1ee5ng thu\u1eadt to\u00e1n n\u00e9n kh\u00f4ng m\u1ea5t d\u1eef li\u1ec7u, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 k\u00edch th\u01b0\u1edbc t\u1ec7p c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u00e1ng k\u1ec3 l\u00ean \u0111\u1ebfn 70-80% m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t \u0111i b\u1ea5t k\u1ef3 th\u00f4ng tin g\u1ed1c n\u00e0o. \u0110i\u1ec1u n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng khi x\u1eed l\u00fd c\u00e1c t\u1eadp\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0kh\u1ed5ng l\u1ed3 c\u00f3 th\u1ec3 l\u00ean t\u1edbi h\u00e0ng terabyte. Vi\u1ec7c n\u00e9n LAZ gi\u00fap ti\u1ebft ki\u1ec7m dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef, t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u qua m\u1ea1ng, v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c ph\u1ea7n m\u1ec1m x\u1eed l\u00fdPoint Cloud. Nh\u1edd t\u00ednh m\u1edf, \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef th\u00f4ng tin m\u1ea1nh m\u1ebd, LAS\/LAZ \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi h\u1ea7u h\u1ebft c\u00e1c ph\u1ea7n m\u1ec1m chuy\u00ean nghi\u1ec7p trong ng\u00e0nh nh\u01b0 ESRI ArcGIS, QGIS, Autodesk Civil 3D, TerraSolid, CloudCompare, v.v. \u0110i\u1ec1u n\u00e0y l\u00e0m cho LAS\/LAZ tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho vi\u1ec7c thu th\u1eadp, x\u1eed l\u00fd, v\u00e0 trao \u0111\u1ed5i\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>Lidar quy m\u00f4 l\u1edbn, t\u1eeb vi\u1ec7c l\u1eadp b\u1ea3n \u0111\u1ed3 \u0111\u1ecba h\u00ecnh \u0111\u1ebfn gi\u00e1m s\u00e1t m\u00f4i tr\u01b0\u1eddng v\u00e0 ph\u00e1t tri\u1ec3n c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng. Trong quan \u0111i\u1ec3m c\u1ee7a t\u00f4i, LAS\/LAZ kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t \u0111\u1ecbnh d\u1ea1ng m\u00e0 c\u00f2n l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef chung, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho s\u1ef1 h\u1ee3p t\u00e1c v\u00e0 trao \u0111\u1ed5i d\u1eef li\u1ec7u xuy\u00ean su\u1ed1t c\u00e1c n\u1ec1n t\u1ea3ng v\u00e0 ng\u00e0nh ngh\u1ec1.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_dang_E57_%E2%80%93_Tieu_chuan_mo_cho_trao_doi_du_lieu_quet\"><\/span>\u0110\u1ecbnh d\u1ea1ng E57 \u2013 Ti\u00eau chu\u1ea9n m\u1edf cho trao \u0111\u1ed5i d\u1eef li\u1ec7u qu\u00e9t<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>\u0110\u1ecbnh d\u1ea1ng E57 l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n m\u1edf, trung l\u1eadp, \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n d\u01b0\u1edbi s\u1ef1 b\u1ea3o tr\u1ee3 c\u1ee7a ASTM International, h\u01b0\u1edbng t\u1edbi m\u1ee5c ti\u00eau ch\u00ednh l\u00e0 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c trao \u0111\u1ed5i\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a03D m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady gi\u1eefa c\u00e1c ph\u1ea7n m\u1ec1m v\u00e0 thi\u1ebft b\u1ecb kh\u00e1c nhau c\u1ee7a c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t. \u0110\u00e2y l\u00e0 m\u1ed9t \u0111i\u1ec3m c\u1ef1c k\u1ef3 quan tr\u1ecdng trong m\u1ed9t th\u1ecb tr\u01b0\u1eddng ng\u00e0y c\u00e0ng \u0111a d\u1ea1ng v\u1ec1 ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m nh\u01b0 hi\u1ec7n nay. E57 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u01b0u tr\u1eef kh\u00f4ng ch\u1ec9\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0(t\u1ecda \u0111\u1ed9, c\u01b0\u1eddng \u0111\u1ed9, m\u00e0u s\u1eafc) m\u00e0 c\u00f2n c\u1ea3 c\u00e1c th\u00f4ng tin \u1ea3nh to\u00e0n c\u1ea3nh (panoramic images) \u0111\u01b0\u1ee3c ch\u1ee5p b\u1edfi m\u00e1y qu\u00e9t, v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn metadata chi ti\u1ebft c\u1ee7a t\u1eebng b\u1ea3n qu\u00e9t ri\u00eang l\u1ebb. Metadata n\u00e0y bao g\u1ed3m th\u00f4ng tin v\u1ec1 thi\u1ebft b\u1ecb qu\u00e9t, v\u1ecb tr\u00ed qu\u00e9t, th\u1eddi gian qu\u00e9t, v\u00e0 th\u1eadm ch\u00ed c\u1ea3 c\u00e1c th\u00f4ng tin hi\u1ec7u ch\u1ec9nh c\u1ea3m bi\u1ebfn, gi\u00fap duy tr\u00ec chu\u1ed7i th\u00f4ng tin ngu\u1ed3n g\u1ed1c c\u1ee7a d\u1eef li\u1ec7u.<\/p>\r\n\r\n\r\n\r\n<p>\u01afu \u0111i\u1ec3m n\u1ed5i b\u1eadt nh\u1ea5t c\u1ee7a E57 ch\u00ednh l\u00e0 t\u00ednh \u0111\u1ed9c l\u1eadp v\u1edbi nh\u00e0 cung c\u1ea5p. \u0110i\u1ec1u n\u00e0y gi\u00fap lo\u1ea1i b\u1ecf r\u00e0o c\u1ea3n t\u01b0\u01a1ng th\u00edch khi c\u00e1c \u0111\u1ed9i ng\u0169 d\u1ef1 \u00e1n s\u1eed d\u1ee5ng m\u00e1y qu\u00e9t ho\u1eb7c ph\u1ea7n m\u1ec1m t\u1eeb c\u00e1c h\u00e3ng kh\u00e1c nhau. V\u00ed d\u1ee5, m\u1ed9t d\u1eef li\u1ec7u qu\u00e9t t\u1eeb m\u00e1y Leica c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c m\u1edf v\u00e0 x\u1eed l\u00fd trong ph\u1ea7n m\u1ec1m c\u1ee7a Faro ho\u1eb7c Topcon m\u00e0 kh\u00f4ng c\u1ea7n c\u00e1c b\u01b0\u1edbc chuy\u1ec3n \u0111\u1ed5i ph\u1ee9c t\u1ea1p hay lo ng\u1ea1i m\u1ea5t m\u00e1t th\u00f4ng tin. E57 tr\u1edf th\u00e0nh &#8220;ng\u00f4n ng\u1eef trung gian&#8221; cho vi\u1ec7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u qu\u00e9t th\u00f4, to\u00e0n v\u1eb9n nh\u1ea5t. Tuy nhi\u00ean, c\u0169ng ch\u00ednh v\u00ec vi\u1ec7c l\u01b0u tr\u1eef \u0111\u1ea7y \u0111\u1ee7 v\u00e0 chi ti\u1ebft nh\u01b0 v\u1eady, c\u00e1c file E57 th\u01b0\u1eddng c\u00f3 k\u00edch th\u01b0\u1edbc r\u1ea5t l\u1edbn, \u0111\u00f4i khi c\u00f2n l\u1edbn h\u01a1n c\u1ea3 file LAS kh\u00f4ng n\u00e9n. \u0110i\u1ec1u n\u00e0y l\u00e0m cho E57 \u00edt l\u00fd t\u01b0\u1edfng h\u01a1n cho vi\u1ec7c x\u1eed l\u00fd ho\u1eb7c hi\u1ec3n th\u1ecb\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0tr\u1ef1c ti\u1ebfp v\u1edbi s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m kh\u1ed5ng l\u1ed3 trong c\u00e1c ph\u1ea7n m\u1ec1m thi\u1ebft k\u1ebf. \u0110\u1ec3 kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1 n\u00e0y, ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc ti\u1ec1n x\u1eed l\u00fd nh\u01b0 gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m ho\u1eb7c n\u00e9n d\u1eef li\u1ec7u tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh c\u00e1c t\u00e1c v\u1ee5 ph\u1ee9c t\u1ea1p h\u01a1n tr\u00ean ph\u1ea7n m\u1ec1m.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_dang_RCS_RCP_%E2%80%93_Doi_tac_khong_the_thieu_trong_du_an_Autodesk\"><\/span>\u0110\u1ecbnh d\u1ea1ng RCS \/ RCP \u2013 \u0110\u1ed1i t\u00e1c kh\u00f4ng th\u1ec3 thi\u1ebfu trong d\u1ef1 \u00e1n Autodesk<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>RCS (ReCap Scan) v\u00e0 RCP (ReCap Project) l\u00e0 hai \u0111\u1ecbnh d\u1ea1ng \u0111\u1ed9c quy\u1ec1n \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi Autodesk, nh\u1eb1m ph\u1ee5c v\u1ee5 cho vi\u1ec7c qu\u1ea3n l\u00fd v\u00e0 x\u1eed l\u00fd\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0trong c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a Revit v\u00e0 c\u00e1c ph\u1ea7n m\u1ec1m thi\u1ebft k\u1ebf kh\u00e1c c\u1ee7a Autodesk. RCS l\u00e0 \u0111\u1ecbnh d\u1ea1ng l\u01b0u tr\u1eef c\u00e1c b\u1ea3n qu\u00e9t point cloud \u0111\u01a1n l\u1ebb, trong khi RCP \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t th\u01b0 m\u1ee5c ch\u1ee9a nhi\u1ec1u file RCS v\u00e0 th\u00f4ng tin li\u00ean quan. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y t\u1ea1o ra m\u1ed9t m\u00f4i tr\u01b0\u1eddng thu\u1eadn l\u1ee3i cho vi\u1ec7c t\u00edch h\u1ee3p\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0v\u00e0o quy tr\u00ecnh l\u00e0m vi\u1ec7c BIM (Building Information Modeling).<\/p>\r\n\r\n\r\n\r\n<p>M\u1ed9t trong nh\u1eefng \u01b0u \u0111i\u1ec3m \u0111\u00e1ng ch\u00fa \u00fd c\u1ee7a RCS\/RCP \u0111\u00f3 l\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch cao v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m kh\u00e1c c\u1ee7a Autodesk. Vi\u1ec7c \u0111\u01b0a\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0v\u00e0o Revit hay AutoCAD tr\u1edf n\u00ean li\u1ec1n m\u1ea1ch, gi\u00fap c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 v\u00e0 k\u1ef9 s\u01b0 d\u1ec5 d\u00e0ng s\u1eed d\u1ee5ng d\u1ea3i c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd c\u1ee7a Autodesk \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 ti\u1ebft ki\u1ec7m th\u1eddi gian m\u00e0 c\u00f2n gia t\u0103ng \u0111\u1ed9 ch\u00ednh x\u00e1c trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf, v\u00ec ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 tham chi\u1ebfu tr\u1ef1c ti\u1ebfp \u0111\u1ebfn\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>trong kh\u00f4ng gian l\u00e0m vi\u1ec7c 3D c\u1ee7a h\u1ecd.<\/p>\r\n\r\n\r\n\r\n<p>Tuy nhi\u00ean, c\u0169ng gi\u1ed1ng nh\u01b0 E57, \u0111\u1ecbnh d\u1ea1ng RCS\/RCP c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c file l\u1edbn, khi\u1ebfn cho vi\u1ec7c chia s\u1ebb v\u00e0 l\u01b0u tr\u1eef tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n. \u0110\u1eb7c bi\u1ec7t l\u00e0 trong m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c \u0111a d\u1ea1ng, n\u01a1i m\u00e0 kh\u00f4ng ph\u1ea3i ai c\u0169ng s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m c\u1ee7a Autodesk. Do \u0111\u00f3, m\u1eb7c d\u00f9 RCS\/RCP r\u1ea5t m\u1ea1nh m\u1ebd trong ecosistem c\u1ee7a Autodesk, nh\u01b0ng vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i sang c\u00e1c \u0111\u1ecbnh d\u1ea1ng m\u1edf kh\u00e1c \u0111\u00f4i khi c\u0169ng c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh linh ho\u1ea1t v\u00e0 kh\u1ea3 n\u0103ng chia s\u1ebb th\u00f4ng tin gi\u1eefa c\u00e1c n\u1ec1n t\u1ea3ng kh\u00e1c nhau.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_dang_PTS_%E2%80%93_Cau_truc_van_ban_de_hieu_nhung_van_co_han_che\"><\/span>\u0110\u1ecbnh d\u1ea1ng PTS \u2013 C\u1ea5u tr\u00fac v\u0103n b\u1ea3n d\u1ec5 hi\u1ec3u nh\u01b0ng v\u1eabn c\u00f3 h\u1ea1n ch\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>PTS (Point Cloud Text Stream) l\u00e0 m\u1ed9t \u0111\u1ecbnh d\u1ea1ng l\u01b0u tr\u1eef th\u00f4ng tin\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0d\u01b0\u1edbi d\u1ea1ng v\u0103n b\u1ea3n thu\u1ea7n t\u00fay. \u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u1ecbnh d\u1ea1ng d\u1ec5 \u0111\u1ecdc v\u00e0 d\u1ec5 hi\u1ec3u, gi\u00fap cho ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 m\u1edf v\u00e0 ch\u1ec9nh s\u1eeda n\u1ed9i dung b\u1eb1ng b\u1ea5t k\u1ef3 tr\u00ecnh so\u1ea1n th\u1ea3o v\u0103n b\u1ea3n n\u00e0o. M\u1ed7i d\u00f2ng trong file PTS t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t \u0111i\u1ec3m trong kh\u00f4ng gian 3D, cung c\u1ea5p th\u00f4ng tin v\u1ec1 t\u1ecda \u0111\u1ed9 X, Y, Z v\u00e0 c\u00f3 th\u1ec3 th\u00eam m\u1ed9t s\u1ed1 thu\u1ed9c t\u00ednh kh\u00e1c nh\u01b0 c\u01b0\u1eddng \u0111\u1ed9 ho\u1eb7c m\u00e0u s\u1eafc.<\/p>\r\n\r\n\r\n\r\n<p>\u01afu \u0111i\u1ec3m l\u1edbn nh\u1ea5t c\u1ee7a PTS l\u00e0 t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 d\u00e0ng trong vi\u1ec7c truy c\u1eadp v\u00e0 ch\u1ec9nh s\u1eeda, \u0111i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch cho c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u ho\u1eb7c l\u1eadp tr\u00ecnh vi\u00ean mu\u1ed1n thao t\u00e1c tr\u1ef1c ti\u1ebfp v\u1edbi\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>. Tuy nhi\u00ean, \u0111i\u1ec1u n\u00e0y c\u0169ng \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c PTS kh\u00f4ng h\u1ed7 tr\u1ee3 nhi\u1ec1u t\u00ednh n\u0103ng ti\u00ean ti\u1ebfn nh\u01b0 c\u00e1c \u0111\u1ecbnh d\u1ea1ng nh\u1ecb ph\u00e2n kh\u00e1c, d\u1eabn \u0111\u1ebfn vi\u1ec7c hi\u1ec7u su\u1ea5t x\u1eed l\u00fd s\u1ebd th\u1ea5p h\u01a1n. Khi l\u00e0m vi\u1ec7c v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn, k\u00edch th\u01b0\u1edbc file v\u0103n b\u1ea3n s\u1ebd nhanh ch\u00f3ng tr\u1edf th\u00e0nh m\u1ed9t v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng, g\u00e2y kh\u00f3 kh\u0103n trong vi\u1ec7c t\u1ea3i l\u00ean v\u00e0 x\u1eed l\u00fd.<\/p>\r\n\r\n\r\n\r\n<p>Trong b\u1ed1i c\u1ea3nh hi\u1ec7n t\u1ea1i, m\u1eb7c d\u00f9 PTS c\u00f3 vai tr\u00f2 nh\u1ea5t \u0111\u1ecbnh trong gi\u00e1o d\u1ee5c v\u00e0 th\u1eed nghi\u1ec7m, th\u00ec n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c \u1ee9ng d\u1ee5ng th\u01b0\u01a1ng m\u1ea1i. Nhi\u1ec1u t\u1ed5 ch\u1ee9c v\u00e0 chuy\u00ean gia th\u01b0\u1eddng thi\u00ean v\u1ec1 s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ecbnh d\u1ea1ng m\u1ea1nh m\u1ebd h\u01a1n, c\u00f3 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef nhi\u1ec1u th\u00f4ng tin v\u00e0 h\u1ed7 tr\u1ee3 cho quy tr\u00ecnh x\u1eed l\u00fd t\u1ef1 \u0111\u1ed9ng h\u01a1n.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_dang_XYZ_%E2%80%93_Tuong_lai_voi_kha_nang_co_ban\"><\/span>\u0110\u1ecbnh d\u1ea1ng XYZ \u2013 T\u01b0\u01a1ng lai v\u1edbi kh\u1ea3 n\u0103ng c\u01a1 b\u1ea3n<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>\u0110\u1ecbnh d\u1ea1ng XYZ l\u00e0 m\u1ed9t trong nh\u1eefng \u0111\u1ecbnh d\u1ea1ng c\u01a1 b\u1ea3n v\u00e0 ph\u1ed5 bi\u1ebfn nh\u1ea5t trong l\u0129nh v\u1ef1c\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>. N\u00f3 l\u01b0u tr\u1eef th\u00f4ng tin v\u1ec1 t\u1ecda \u0111\u1ed9 3D c\u1ee7a m\u1ed7i \u0111i\u1ec3m d\u01b0\u1edbi d\u1ea1ng ba c\u1ed9t s\u1ed1, m\u1ed7i c\u1ed9t t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1ecda \u0111\u1ed9 X, Y v\u00e0 Z. M\u1eb7c d\u00f9 \u0111\u00e2y l\u00e0 m\u1ed9t \u0111\u1ecbnh d\u1ea1ng \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 hi\u1ec3u, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 tr\u1edf n\u00ean h\u1ea1n ch\u1ebf khi c\u1ea7n l\u01b0u tr\u1eef th\u00eam c\u00e1c thu\u1ed9c t\u00ednh kh\u00e1c nh\u01b0 m\u00e0u s\u1eafc hay c\u01b0\u1eddng \u0111\u1ed9.<\/p>\r\n\r\n\r\n\r\n<p>L\u1ee3i th\u1ebf l\u1edbn nh\u1ea5t c\u1ee7a XYZ ch\u00ednh l\u00e0 s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 d\u00e0ng s\u1eed d\u1ee5ng. Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng nh\u1eadp v\u00e0 xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb c\u00e1c ph\u1ea7n m\u1ec1m GIS ho\u1eb7c CAD m\u00e0 kh\u00f4ng g\u1eb7p ph\u1ea3i r\u00e0o c\u1ea3n k\u1ef9 thu\u1eadt. Tuy nhi\u00ean, do kh\u00f4ng th\u1ec3 l\u01b0u tr\u1eef \u0111\u01b0\u1ee3c c\u00e1c thu\u1ed9c t\u00ednh b\u1ed5 sung, XYZ th\u01b0\u1eddng kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u th\u00f4ng tin phong ph\u00fa h\u01a1n, nh\u01b0 ph\u00e2n t\u00edch h\u00ecnh h\u1ecdc chi ti\u1ebft ho\u1eb7c m\u00f4 h\u00ecnh h\u00f3a 3D n\u00e2ng cao.<\/p>\r\n\r\n\r\n\r\n<p>Trong b\u1ed1i c\u1ea3nh c\u00f4ng nghi\u1ec7p hi\u1ec7n nay, m\u1eb7c d\u00f9 XYZ c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn t\u1ed1t cho c\u00e1c \u1ee9ng d\u1ee5ng c\u01a1 b\u1ea3n, nh\u01b0ng vi\u1ec7c chuy\u1ec3n sang c\u00e1c \u0111\u1ecbnh d\u1ea1ng phong ph\u00fa h\u01a1n nh\u01b0 LAS, LAZ, hay E57 s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch to l\u1edbn h\u01a1n v\u1ec1 m\u1eb7t th\u00f4ng tin v\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd. Do \u0111\u00f3, t\u00f9y thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a d\u1ef1 \u00e1n, vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng s\u1ebd ph\u1ea3i c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng.<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_dang_PLY_%E2%80%93_Luu_tru_tinh_vi_cho_mo_hinh_da_giac\"><\/span>\u0110\u1ecbnh d\u1ea1ng PLY \u2013 L\u01b0u tr\u1eef tinh vi cho m\u00f4 h\u00ecnh \u0111a gi\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>PLY (Polygon File Format or Stanford Triangle Format) l\u00e0 m\u1ed9t \u0111\u1ecbnh d\u1ea1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u1ee7 y\u1ebfu cho l\u01b0u tr\u1eef\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a03D c\u00f9ng v\u1edbi th\u00f4ng tin v\u1ec1 m\u00f4 h\u00ecnh \u0111a gi\u00e1c. V\u1edbi kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef c\u1ea3 t\u1ecda \u0111\u1ed9, m\u00e0u s\u1eafc, v\u00e0 c\u1ea5u tr\u00fac \u0111a gi\u00e1c, PLY tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn trong l\u0129nh v\u1ef1c \u0111\u1ed3 h\u1ecda m\u00e1y t\u00ednh v\u00e0 m\u00f4 h\u00ecnh h\u00f3a 3D. Th\u1ef1c t\u1ebf, PLY cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u phong ph\u00fa h\u01a1n so v\u1edbi c\u00e1c \u0111\u1ecbnh d\u1ea1ng nh\u01b0 XYZ ho\u1eb7c PTS.<\/p>\r\n\r\n\r\n\r\n<p>M\u1ed9t trong nh\u1eefng \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a PLY l\u00e0 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef th\u00f4ng tin chi ti\u1ebft v\u1ec1 b\u1ec1 m\u1eb7t v\u00e0 k\u1ebft c\u1ea5u c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng 3D. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 h\u1eefu \u00edch cho c\u00e1c \u1ee9ng d\u1ee5ng thi\u1ebft k\u1ebf m\u00e0 c\u00f2n trong vi\u1ec7c ph\u00e1t tri\u1ec3n game ho\u1eb7c \u1ee9ng d\u1ee5ng AR\/VR. PLY h\u1ed7 tr\u1ee3 c\u1ea3 hai ki\u1ec3u l\u01b0u tr\u1eef: \u1edf d\u1ea1ng nh\u1ecb ph\u00e2n v\u00e0 d\u1ea1ng v\u0103n b\u1ea3n, gi\u00fap ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 ch\u1ecdn l\u1ef1a ph\u01b0\u01a1ng th\u1ee9c ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a m\u00ecnh.<\/p>\r\n\r\n\r\n\r\n<p>M\u1eb7c d\u00f9 PLY m\u1ea1nh m\u1ebd trong vi\u1ec7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u \u0111a gi\u00e1c, nh\u01b0ng n\u00f3 c\u0169ng c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf. Vi\u1ec7c x\u1eed l\u00fd c\u00e1c file PLY l\u1edbn c\u00f3 th\u1ec3 ti\u00eau t\u1ed1n nhi\u1ec1u t\u00e0i nguy\u00ean h\u1ec7 th\u1ed1ng v\u00e0 th\u1eddi gian. H\u01a1n n\u1eefa, kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n m\u1ec1m \u0111\u1ec1u h\u1ed7 tr\u1ee3 \u0111\u1ecbnh d\u1ea1ng n\u00e0y m\u1ed9t c\u00e1ch ho\u00e0n h\u1ea3o, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra v\u1ea5n \u0111\u1ec1 trong vi\u1ec7c trao \u0111\u1ed5i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c n\u1ec1n t\u1ea3ng. Ch\u00ednh v\u00ec v\u1eady, khi quy\u1ebft \u0111\u1ecbnh s\u1eed d\u1ee5ng PLY, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n xem x\u00e9t c\u1ea9n th\u1eadn v\u1ec1 m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c v\u00e0 \u1ee9ng d\u1ee5ng d\u1ef1 ki\u1ebfn.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Trong b\u1ed1i c\u1ea3nh c\u00f4ng ngh\u1ec7 ng\u00e0y c\u00e0ng ph\u00e1t tri\u1ec3n, vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng ph\u00f9 h\u1ee3p cho\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>\u00a0kh\u00f4ng ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 c\u00f4ng vi\u1ec7c m\u00e0 c\u00f2n quy\u1ebft \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 t\u00ednh ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c d\u1ef1 \u00e1n. C\u00e1c \u0111\u1ecbnh d\u1ea1ng nh\u01b0 LAS\/LAZ, E57, RCS\/RCP, PTS, XYZ v\u00e0 PLY \u0111\u1ec1u c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 h\u1ea1n ch\u1ebf ri\u00eang, t\u1eeb t\u00ednh d\u1ec5 s\u1eed d\u1ee5ng cho \u0111\u1ebfn kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef th\u00f4ng tin phong ph\u00fa. \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 th\u00f4ng tin chi ti\u1ebft, LAS\/LAZ v\u00e0 E57 th\u01b0\u1eddng l\u00e0 nh\u1eefng l\u1ef1a ch\u1ecdn \u01b0u vi\u1ec7t. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu b\u1ea1n c\u1ea7n m\u1ed9t \u0111\u1ecbnh d\u1ea1ng \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng, XYZ ho\u1eb7c PTS c\u00f3 th\u1ec3 l\u00e0 l\u1ef1a ch\u1ecdn h\u1ee3p l\u00fd.<\/p>\r\n\r\n\r\n\r\n<p>\u0110\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a c\u00e1c kh\u1ea3 n\u0103ng c\u1ee7a\u00a0<strong>d\u1eef li\u1ec7u point cloud<\/strong>, ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng ch\u1ec9 c\u1ea7n hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c \u0111\u1ecbnh d\u1ea1ng m\u00e0 c\u00f2n ph\u1ea3i bi\u1ebft c\u00e1ch \u00e1p d\u1ee5ng ch\u00fang trong t\u1eebng ng\u1eef c\u1ea3nh c\u1ee5 th\u1ec3. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng ph\u00f9 h\u1ee3p theo nhu c\u1ea7u d\u1ef1 \u00e1n v\u00e0 ph\u1ea7n m\u1ec1m l\u00e0 \u0111i\u1ec1u c\u1ef1c k\u1ef3 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o quy tr\u00ecnh l\u00e0m vi\u1ec7c di\u1ec5n ra su\u00f4n s\u1ebb. Th\u00f4ng qua vi\u1ec7c t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u00e1c d\u1ecbch v\u1ee5 li\u00ean quan \u0111\u1ebfn\u00a0<strong>point cloud<\/strong>, b\u1ea1n c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh l\u00e0m vi\u1ec7c v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t cho d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh.<\/p>\r\n\r\n\r\n\r\n<p>T\u1ea1i <a href=\"https:\/\/vmts.ch\/vi\/\"><strong>VMT Solutions<\/strong><\/a>, ch\u00fang t\u00f4i cung c\u1ea5p gi\u1ea3i ph\u00e1p to\u00e0n di\u1ec7n t\u1eeb qu\u00e9t hi\u1ec7n tr\u1ea1ng, x\u1eed l\u00fd d\u1eef li\u1ec7u cho \u0111\u1ebfn x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh BIM v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c cao, \u0111\u00e1p \u1ee9ng \u0111a d\u1ea1ng y\u00eau c\u1ea7u t\u1eeb kh\u00e1ch h\u00e0ng trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc. \u0110\u1ed9i ng\u0169 k\u1ef9 s\u01b0 gi\u00e0u kinh nghi\u1ec7m c\u00f9ng h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i s\u1ebd \u0111\u1ed3ng h\u00e0nh c\u00f9ng b\u1ea1n t\u1eeb giai \u0111o\u1ea1n kh\u1ea3o s\u00e1t \u0111\u1ebfn ho\u00e0n thi\u1ec7n m\u00f4 h\u00ecnh.<\/p>\r\n\r\n\r\n\r\n<p>H\u00e3y li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i ngay h\u00f4m nay \u0111\u1ec3 nh\u1eadn t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u00e0 kh\u00e1m ph\u00e1 c\u00e1ch th\u1ee9c VMT Solutions c\u00f3 th\u1ec3 \u0111\u1ed3ng h\u00e0nh trong h\u00e0nh tr\u00ecnh s\u1ed1 h\u00f3a c\u00f4ng tr\u00ecnh c\u1ee7a b\u1ea1n.<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\r\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-awb-color-5-background-color has-background has-text-align-center wp-element-button\" href=\"https:\/\/vmts.ch\/vi\/lien-he\/\">Li\u00ean h\u1ec7 ngay\u00a0\u0111\u1ec3 b\u1eaft \u0111\u1ea7u!<\/a><\/div>\r\n<\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>Trong b\u1ed1i c\u1ea3nh c\u00f4ng ngh\u1ec7 3D \u0111ang ph\u00e1t tri\u1ec3n v\u0169 b\u00e3o,\u00a0d\u1eef li\u1ec7u point cloud\u00a0\u0111\u00e3 n\u1ed5i l\u00ean nh\u01b0 m\u1ed9t tr\u1ee5 c\u1ed9t kh\u00f4ng th\u1ec3 thi\u1ebfu, cung c\u1ea5p c\u00e1i nh\u00ecn chi ti\u1ebft v\u00e0 kh\u00e1ch quan v\u1ec1 th\u1ebf gi\u1edbi [&#8230;]<\/p>\n","protected":false},"author":2,"featured_media":31670,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[416],"tags":[],"class_list":["post-31667","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-point-cloud"],"acf":[],"_links":{"self":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/posts\/31667","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/comments?post=31667"}],"version-history":[{"count":1,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/posts\/31667\/revisions"}],"predecessor-version":[{"id":32154,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/posts\/31667\/revisions\/32154"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/media\/31670"}],"wp:attachment":[{"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/media?parent=31667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/categories?post=31667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vmts.ch\/vi\/wp-json\/wp\/v2\/tags?post=31667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}