Color projection module, stripe decoding method and device, medium, equipment and system

Abstract

The invention relates to a color projection module, a fringe decoding method and device, a medium, equipment and a system. The color projection module is used for projecting a color stripe pattern to the surface of a measured object, the color stripe pattern comprises m periodically repeated basic stripe sequences, m is a positive integer, the basic stripe sequences comprise k stripes with different colors, and n-bit stripe sequences formed by any continuous n stripes are unique; the total number l of stripes of the basic stripe sequence satisfies l < = 10, 10 = kn, and k and n are both positive integers equal to or greater than 2. Therefore, stripe coding and corresponding decoding are realized by using the periodically repeatable color stripes, the number of stripe colors can be reduced, the number of stripes required by decoding can be reduced, and improvement of decoding stability, simplification of the structure and improvement of scanning efficiency are facilitated.

Description

technical field [0001] The present disclosure relates to the technical field of three-dimensional measurement, and in particular, to a color projection module, a fringe decoding method, device, medium, device and system. Background technique [0002] In recent years, structured light 3D measurement technology has developed rapidly. It relies on non-contact, high-precision, high-efficiency measurement characteristics, and has been widely used in industrial testing, auxiliary medical care, electronic equipment, cultural relics restoration and other fields. Structured light 3D measurement technology is a 3D reconstruction technology that projects a coded pattern on the surface of the object to be measured, and acquires and analyzes the coded pattern modulated by the surface topography of the object to obtain the real three-dimensional topography of the object. Structured light 3D measurement technology can be divided into single-frame structured light and multi-frame structured...

AI Technical Summary

Problems solved by technology

However, the more types of stripe colors, the more serious the interference by the surface texture of the object, and the more unstable the decoding; the more the number of stripes required for decoding a single stripe, the greater the interference by the discontinuous surface of the object, the higher the decoding error rate, and it is difficult to reconstruct smaller objects

Therefore, the existing color fringe coding technology is mostly limited to the uniqueness of each fringe code on a single image, resulting in many types of fringe colors or large decoding width, unstable decoding, and poor reconstruction integrity, which greatly limits the scanning efficiency

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