A point cloud stitching method and system based on a white light scanner

Abstract

The invention relates to a white-light scanner-based point cloud splicing method and system. The method comprises the following steps: S1, utilizing grayscale cameras and a color camera of a white-light scanner to shoot an image of a sample alternatively; S2, acquiring the image, executing S3 when the image is a grayscale image, and executing S4 when the image is a color image; S3, extracting a mark point of the grayscale image, judging whether the mark point is successfully extracted, executing S31 if the mark point is successfully extracted, and executing S32 if the mark point is not successfully extracted; S31, using a mark-point splicing method to carry out point cloud splicing on grayscale images; S32, using a point cloud ICP splicing method to carry out point cloud splicing on the grayscale images; and S4, using a texture matching splicing method to carry out point cloud splicing on color images. According to the method, precision and stability of point cloud splicing are improved through carrying out organic combination on the various splicing methods, and a better point cloud splicing effect is achieved.

Description

technical field [0001] The invention relates to the field of photogrammetry, in particular to a point cloud splicing method and system based on a white light scanner. Background technique [0002] There are mainly three existing point cloud stitching methods, namely point cloud ICP stitching method, marker point stitching method and texture matching (SIFT) stitching method. Among them, the point cloud ICP stitching method is not suitable for point cloud stitching of ruled surfaces; the marker point stitching method needs to paste marker points on the surface of the object, which will cause certain damage to the research object and the post-processing is more complicated; texture matching (SIFT) stitching method is not suitable for point cloud stitching without textures. In addition, in the process of point cloud stitching, stitching errors often occur due to insufficient texture information on the surface of objects, and the stitching effect is poor. Contents of the inven...

AI Technical Summary

Problems solved by technology

Among them, the point cloud ICP stitching method is not suitable for point cloud stitching of ruled surfaces; the marker point stitching method needs to paste marker points on the surface of the object, which will cause certain damage to the research object and the post-processing is more complicated; texture matching (SIFT) stitching Method does not work for point cloud stitching without textures

In addition, in the process of point cloud stitching, stitching errors often occur due to insufficient texture information on the surface of objects, and the stitching effect is poor.

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