A method and system for three-dimensional measurement of surface structured light based on phase weighted fusion

Abstract

The invention discloses a method and system for three-dimensional measurement of surface structured light based on phase weighted fusion. Based on different phase images acquired under multiple exposure times, a phase weighted fusion model is constructed, and an accurate phase value is calculated based on the phase values ​​under multiple exposure times. The phase value, combined with the neighborhood phase distribution, can obtain a uniform phase distribution map. Compared with the traditional method of pixel-level replacement on the grayscale image to achieve high dynamic range image synthesis, it can reduce camera noise, local reflection, etc. Due to the influence of errors caused by factors, a more accurate phase map can be obtained, and the precise matching of the left and right camera phase points can be achieved to ensure the accuracy and smoothness of the reconstructed point cloud.

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...

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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

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