Measuring system of three-dimensional shape of strong reflecting surface based on high dynamic strip projector

Abstract

The invention relates to a measuring system of a three-dimensional shape of a strong reflecting surface based on a high dynamic strip projector. The measuring system comprises a computer, the high dynamic strip projector and an image acquisition unit. Projection control information is sent to the high dynamic strip projector by the system through the computer, strip images in different light intensities and gray levels are controlled to be projected, meanwhile, control information is sent to the image acquisition unit by the computer, and the image acquisition unit is controlled to carry out photographing in different time periods of exposure; collected image information is transmitted to the computer by the image acquisition unit, the image is processed by the computer, and three-dimensional information of a to-be-detected object is acquired by image fusion, dephasing, phase unwrapping and stereo matching. According to the measuring system of the three-dimensional shape of the strong reflecting surface based on the high dynamic strip projector, saturation and / or excessive darkness of a collected strip image caused by the strong reflecting surface can be overcome, high-precision non-contact optical measurement of the three-dimensional shapes of the strong reflecting surfaces of metals and the like can be realized, and the measuring system of the three-dimensional shape of the strong reflecting surface based on the high dynamic strip projector can be applied to high-precision non-contact optical measurement of the three-dimensional shapes of the strong reflecting surfaces and mirror-similar surfaces of various metals.

Description

technical field [0001] The invention relates to a three-dimensional shape measurement system for strongly reflective surfaces based on a high dynamic stripe projector. The system can effectively overcome the influence of strongly reflective surfaces or strong background light on measurement, and realize high-precision non-contact optical measurement. The invention relates to three-dimensional shape measurement of reflective surfaces and mirror-like surfaces, and the invention belongs to the technical field of optical three-dimensional measurement. Background technique [0002] As a typical non-contact optical active 3D measurement method, the stereo vision detection method based on sinusoidal fringe projection is widely used in many fields such as 3D shape measurement, reverse engineering and quality inspection. The measurement system using this active vision measurement method has the advantages of high measurement accuracy, dense point cloud acquisition, and short measurem...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a three-dimensional topography measurement system for strongly reflective surfaces based on a high dynamic stripe projector, so as to solve the problem that the existing non-contact optical active three-dimensional measurement system cannot effectively measure the three-dimensional topography of strongly reflective surfaces or mirror-like surfaces Or the problem of low measurement accuracy when the background light intensity is strong

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