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Phase de-packaging method of color fringe coding

A color stripe, de-wrapping technology, applied in image data processing, measuring devices, instruments, etc., can solve problems such as unsatisfactory effects

Inactive Publication Date: 2009-05-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods need to collect multiple images on the time axis to solve the phase, and are only suitable for static measurements that do not have special requirements for measurement time, and the effect of dynamic measurements is not ideal.

Method used

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  • Phase de-packaging method of color fringe coding
  • Phase de-packaging method of color fringe coding
  • Phase de-packaging method of color fringe coding

Examples

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0031] see figure 1 , the arrangement order of the colored stripes is set as follows: each group of stripes starts with a red stripe, is centered with a green stripe, and ends with a blue stripe. These fringes are coded with two digits "i j", "i" represents the period of the fringe pattern, that is, "group". "j" indicates the color code of the stripe, that is, 0 for red, 1 for green, and 2 for blue. like figure 1 The "12" in represents the blue fringe of the second period in the color fringe pattern.

[0032] Color fringe coded fringe pattern solution based on obtaining the principle phase of the phase shift measurement The "n(x, y)" in , dephases along the vertical direction of the stripe arrangement. The specific steps are:

[0033] 1) Project as figure 1 The color-coded fringe shown is to the surface of the three-dimensional object ...

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Abstract

The invention relates to a phase package-removing method for color stripe code which solves n(x, y) in phi(x, y)=phi(x, y)+2pin(x, y) by using color stripe code striped graph and carries phase unwrapping along a direction perpendicular to stripe arrangement on the basis of obtaining a principle phase of phase shift measurement. Compared with conventional phase package-removing method, the phase package-removing method of present invention simplifies operation, greatly increases data processing efficiency and shortens data processing time. Due to employing a color coding technology in the phase package-removal, the method reduces influence of environment interference light source, and improves anti-interference capability of image process. Because the width of the color code stripe can be arbitrarily regulated, the method is adapted for measuring objects with large inclination angle relative to projection optical axis and discontinuous surface. By combining a color More stripe phase shift measurement method and the color code phase package-removing method, the invention can measure not only static three dimensional object appearance, but also dynamic three dimensional object appearance.

Description

technical field [0001] The invention belongs to the field of three-dimensional sensing and measurement, can be widely used in the static, dynamic and on-line detection of three-dimensional object appearance, and realizes the phase removal of color fringe coding for the phase demodulation of the phase demodulation of the three-dimensional object contour detected by the optical phase shift method. wrapping method. Background technique [0002] In the field of rapid development and manufacturing of modern products, the three-dimensional shape measurement of objects has been widely used. Compared with other structured light measurement methods, the optical phase shift method is widely used in aerospace, machinery manufacturing, and medical diagnosis because of its full-field measurement, fast measurement speed, high precision, and portable detection of instruments. , computer-aided design / manufacturing, robot vision systems, and online inspection and quality control. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25G06T7/00
Inventor 李兵蒋庄德丁建军黄梦涛王沙威
Owner XI AN JIAOTONG UNIV
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