公开(公告)号：US11887254B2

公开(公告)日：2024-01-30

申请号：US17437685

申请日：2021-02-04

申请人： CHONGQING SURVEY INSTITUTE

发明人： Zejun Xiang ,  Zhiyong Zhou ,  Yan Zhang ,  Liangchao Chen ,  Kaiquan Hu ,  Hong Ma ,  Junqian Zhang

IPC分类号： G06T17/05 ,  G06F17/16 ,  G06T19/20

CPC分类号： G06T17/05 ,  G06F17/16 ,  G06T19/20 ,  G06T2210/32 ,  G06T2219/2016

摘要： A method for correcting space coordinates of a three-dimensional model includes: step S1, reading information of an original coordinate frame of a three-dimensional model in a first format and the origin of coordinates of the model; reading information of nodes from three-dimensional model data in the first format, and calculating original coordinates of the nodes; step S2, calculating parameters of correction between the original coordinate frame and a target coordinate frame; step S3, transforming and correcting the coordinates of the origin and nodes of the three-dimensional model in the first format one by one by using the space coordinate correction matrix to obtain information of coordinate points of the three-dimensional model in the second format; and step S4, storing a file of the three-dimensional model in the second format with corrected space coordinates. Also, a method for encrypting space coordinates of a three-dimensional model is provided.