Optical three-dimensional measurement method with absolute phase measurement

A three-dimensional measurement and absolute phase technology, applied in the field of optical three-dimensional sensing, can solve problems such as low reliability, long measurement time, and complex decoding algorithms
CN101806587AInactive Publication Date: 2010-08-18ZHEJIANG NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG NORMAL UNIVERSITY
Publication Date
2010-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of an optical three-dimensional sensor technology, particularly relating to an optical three-dimensional measurement method with absolute phase measurement. The invention provides a method which adopts a single assistant coding pattern, which combines the intercepting phase distributing characteristic with the coding pattern deforming characteristic ina phase coding project, and uses 3-value gray level coding, thereby improving the decoding reliability and simplifying the decoding algorithm. By adding a sine optical grating or a logic optical grating pattern with a space gray level coding pattern, the method realizes the absolute phase measurement to compute the three-dimensional feature and the space room of an object.
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Description

technical field

[0001] The invention belongs to the technical field of optical three-dimensional sensing, and in particular relates to an optical three-dimensional measurement method using absolute phase measurement. Background technique

[0002] Optical 3D sensing technology based on structured light illumination has a wide range of applications in the fields of industrial inspection, quality control, machine vision, film and television special effects, and biomedicine. One of the key points of this technology is the matching of the corresponding points between the projection plane and the camera image plane, usually using color, grayscale, grating phase, or symbols or symbol sequences encoded by the above parameters to achieve corresponding point matching.

[0003] The existing structured light lighting three-dimensional sensing technology can be divided into color-based and gray-scale-based coding schemes according to whether it is related to color; according to the param...

Claims

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