Object three-dimensional surface shape measuring method and device based on stripe light streams

A technology of three-dimensional surface shape and measurement method, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of large data processing volume, lack of solutions, and complicated calculation, and achieves high measurement sensitivity, simple calculation, and anti-noise. good effect

Inactive Publication Date: 2019-03-22
SHANDONG NORMAL UNIV
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Problems solved by technology

Use phase shift technology to obtain edge contrast, and restore the height of the object by searching for comparison and height search. This method can effectively restore the height of the object, but it needs to collect multiple images, and the amount of data processing in the calculation is large and the calculation is complicated.
[0004] To sum up, there is still a lack of effective solutions for the overlapping of spectrum, large amount of data processing, and complex calculation.

Method used

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  • Object three-dimensional surface shape measuring method and device based on stripe light streams
  • Object three-dimensional surface shape measuring method and device based on stripe light streams
  • Object three-dimensional surface shape measuring method and device based on stripe light streams

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[0070] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0071] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0072] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combi...

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Abstract

The invention discloses an object three-dimensional surface shape measuring method and device based on stripe light streams. By applying an optical flow field method, the object three-dimensional surface shape can be obtained just through two images. The method comprises the following steps that optical grating stripes are simulated and generated and projected to the surface of a measured object;patterns obtained before and after stripe deformation are collected; the stripe optical flow field method is adopted for working out three-dimensional surface shape information of the measured object.

Description

technical field [0001] The present disclosure relates to the field of object surface shape measurement, in particular to a method and device for measuring a three-dimensional surface shape of an object based on fringe optical flow. Background technique [0002] 3D surface shape measurement is widely used in target detection, product inspection, manufacturing, restoration of cultural relics and other fields. Surface shape measurement using projection grating is a relatively common measurement method at present, which has the characteristics of non-contact, high precision, and relatively simple experimental system. The main method of measuring the surface shape of an object by using a projection grating is the phase demodulation method, including: Fourier transform profilometry and phase shift method. Fourier profilometry only needs to collect one or two deformed fringe images to perform three-dimensional reconstruction and realize the measurement of object contours. It has t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/254
Inventor 孙平代晴
Owner SHANDONG NORMAL UNIV
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