Surface structured light three-dimensional measurement method and system based on phase weighted fusion

Abstract

The invention discloses a surface structured light three-dimensional measurement method and system based on phase weighted fusion, and the method comprises the steps: constructing a phase weighted fusion model based on different phase images obtained under multiple exposure times, calculating an accurate phase value based on the phase value under multiple exposure times, and obtaining a uniform phase distribution diagram through combining the neighborhood phase distribution. Compared with a traditional method of carrying out pixel-level replacement on a grey-scale image to realize high dynamic range image synthesis, the method has the advantages that error influence caused by factors such as camera noise and local reflection can be reduced, a more accurate phase image can be acquired, accurate matching of phase points of a left camera and a right camera is realized, and accuracy and smoothness of reconstructed point cloud are guaranteed.

Description

technical field [0001] The invention belongs to the field of three-dimensional measurement, and more specifically relates to a method and system for three-dimensional measurement of surface structured light based on phase weighted fusion. Background technique [0002] At present, in the field of industrial parts measurement, the three-dimensional measurement technology based on surface structured light has the advantages of fast measurement speed and large amount of data, and has been widely used. However, industrial metal parts often have multi-reflection areas such as rust, oil stains, and processed reflective surfaces on the surface, resulting in weak reflection, strong reflection, multiple reflection, scattering, etc., resulting in low signal-to-noise ratio and saturation distortion in the image. phenomenon, resulting in large phase calculation errors and three-dimensional calculation errors. [0003] Aiming at this problem, the existing solutions are mainly divided int...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a three-dimensional measurement method and system of surface structured light based on phase weighted fusion, thereby solving the problem caused by the low calculation accuracy of the phase map in the existing multiple exposure fusion method The technical problem that the reconstructed point cloud is not smooth

Images