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Three-dimensional measurement method combining two-step phase shift method with phase encoding

A phase-encoding and three-dimensional measurement technology, applied in measurement devices, instruments, optical devices, etc., can solve the problems of inability to realize three-dimensional measurement and shape reconstruction of moving objects, and achieve the effect of reducing measurement errors and error rates.

Active Publication Date: 2020-05-29
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0003] Through the analysis and research on the research status and development trends at home and abroad, the traditional three-dimensional measurement technology has been developed relatively mature, but most of them are static measurements, which cannot realize the three-dimensional measurement and shape reconstruction of moving objects

Method used

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  • Three-dimensional measurement method combining two-step phase shift method with phase encoding
  • Three-dimensional measurement method combining two-step phase shift method with phase encoding
  • Three-dimensional measurement method combining two-step phase shift method with phase encoding

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Embodiment Construction

[0072] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0073] A three-dimensional measurement system of a two-step phase shift method combined with a phase encoding three-dimensional measurement method of the present invention is as follows: figure 1 As shown, it includes a DLP projector 1, a CCD camera 2, a computer 3, a measuring support 4, a reference plane 5 and an object to be measured 6; the DLP projector 1 and the CCD camera 2 are placed on the measuring support 4; the DLP projector 1, the CCD The cameras 2 are respectively connected to the computer 3 through data lines; the object to be measured 6 is placed on the reference plane 5; the computer 3 includes an image acquisit...

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Abstract

The invention discloses a three-dimensional measurement method combining a two-step phase shift method with phase encoding. The three-dimensional measurement method is composed of three key parts including a two-step phase shift principle, a phase fusion method and a phase encoding principle. The method is advantaged in that compared with a traditional phase shift algorithm, the two-step phase shift algorithm can greatly reduce measurement errors and can be well used for actual measurement, the phase information of two wrapped phase diagrams is directly fused, and only one wrapped phase diagram needs to be subjected to phase unwrapping, so the error rate is reduced to a certain extent; compared with a method based on intensity coding, the phase coding method is insensitive to surface contrast, ambient light and camera noise, and has high robustness.

Description

technical field [0001] The invention relates to a three-dimensional measurement method for phase encoding stripes, belonging to the field of photoelectric detection, and in particular to a three-dimensional measurement method combining a two-step phase shift method with phase encoding. Background technique [0002] Because of its advantages of high speed, high precision, non-contact, full-field measurement, and fast information acquisition, fringe projection profilometry is of great significance in 3D measurement and has been widely used in many fields such as industrial manufacturing, cultural relic protection, and medical treatment. [0003] Through the analysis of the research status and development trends at home and abroad, the traditional three-dimensional measurement technology has been developed relatively mature, but most of them are static measurements, which cannot realize the three-dimensional measurement and shape reconstruction of moving objects. In recent year...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/254
Inventor 伏燕军桂建楠韩勇华张鹏飞
Owner NANCHANG HANGKONG UNIVERSITY
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