Method and device for generating digital model

A method for generating a digital model, comprising:

• acquiring integrated point cloud data of a measured object based on at least one set of measured object images of the measured object;
• performing mesh processing on the integrated point cloud data with a first resolution to obtain a first mesh model of the measured object, wherein the first mesh model comprises a first area needing to be subjected to mesh processing again;
• performing mesh processing on original point cloud data in the first area with a second resolution to obtain a second mesh model;
• and
• integrating the second mesh model and mesh models, except the first area, in the first mesh model to generate an integrated mesh model;
• wherein the step of performing the mesh processing on the integrated point cloud data with at least two different resolutions so as to obtain at least two mesh models of the measured object comprises:
• performing mesh processing on the integrated point cloud data with a first resolution to obtain a first mesh model of the measured object;
• determining a to-be-adjusted area in the first mesh model;
• determining original point cloud data falling within the to-be-adjusted area from the integrated point cloud data and dividing the original point cloud data falling within the to-be-adjusted area from the integrated point cloud data;
• and performing mesh processing, with a second resolution, on the original point cloud data falling within the to-be-adjusted area to obtain a second mesh model of the to-be-adjusted area, wherein the integrated point cloud data comprises point cloud data in the to-be-adjusted area;
• the step of performing mesh processing on the integrated point cloud data with the first resolution to obtain the first mesh model of the measured object comprises:
• in a case that part of original point clouds are obtained via scanning, starting mesh processing on the existing part of the original point cloud data;
• in a later scanning process, performing mesh processing on the original point cloud data newly generated via scanning in an incremental manner based on previous meshes, so that a first mesh model of a measured object is obtained.

A device for generating a digital model, comprising:

• a first acquisition component configured to acquire integrated point cloud data of a measured object based on at least one set of measured object images of the measured object;
• a first processing component configured to perform mesh processing on the integrated point cloud data with at least two different resolutions so as to obtain at least two mesh models of the measured object;
• and
• a first generation component configured to integrate the at least two mesh models so as to generate an integrated mesh model with multiple resolutions;
• the first processing component is further configured to:
• perform mesh processing on the integrated point cloud data with a first resolution to obtain a first mesh model of the measured object;
• determine a to-be-adjusted area in the first mesh model;
• determine original point cloud data falling within the to-be-adjusted area from the integrated point cloud data and dividing the original point cloud data falling within the to-be-adjusted area from the integrated point cloud data;
• and perform mesh processing, with a second resolution, on the original point cloud data falling within the to-be-adjusted area to obtain a second mesh model of the to-be-adjusted area, wherein the integrated point cloud data comprises point cloud data in the to-be-adjusted area;
• the first processing component is further configured to ::
• in a case that part of original point clouds are obtained via scanning, start mesh processing on the existing part of the original point cloud data;
• in a later scanning process, perform mesh processing on the original point cloud data newly generated via scanning in an incremental manner based on previous meshes, so that a first mesh model of a measured object is obtained.