Three-dimensional measurement method and system based on color random binary coded structure lighting

A binary coding and structured lighting technology, applied to measuring devices, details related to processing steps, image data processing, etc., can solve problems such as low measurement accuracy and spatial resolution, inability to reflect the actual state, and difficulty in synchronizing three-dimensional measurement. Achieve high spatial resolution, high reliability, and high measurement accuracy

Active Publication Date: 2018-04-27
SICHUAN UNIV
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Problems solved by technology

Although it is only necessary to strictly guarantee the synchronization of the two cameras (the author has designed a continuously transforming speckle projection device), it is necessary to obtain multiple frames of images for calculation
Due to the unavoidable time consumed by image acquisition, the reconstruction result cannot reflect the actual

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  • Three-dimensional measurement method and system based on color random binary coded structure lighting
  • Three-dimensional measurement method and system based on color random binary coded structure lighting
  • Three-dimensional measurement method and system based on color random binary coded structure lighting

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Embodiment Construction

[0042] In the following, the present invention will be further described in detail in conjunction with the accompanying drawings and embodiments, so as to make the purpose, technical solutions and advantages of the present invention more clear. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] Such as figure 1 As shown, the three-dimensional measurement method based on color random binary coding structured illumination according to an embodiment of the present invention includes the following steps:

[0044] Step 101: Generate three grayscale random binary coded images with different pattern distributions respectively

[0045] Specifically, a gray-scale random binary coded image can be generated through computer programming, wherein the gray-scale random binary code generated can be based on a combination of local and global randomness to ensure a high degree of ran...

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Abstract

The invention discloses a three-dimensional measurement method and system based on color random binary coded structure lighting, can reduce influence of color crosstalk on three-dimensional reconstruction and can realize full-resolution dynamic 3D measurement with higher measurement accuracy and higher spatial resolution. The method comprises steps that three grayscale random binary coded images with different pattern distributions are generated respectively; a color random binary coded structure light image is acquired; the acquired color random binary coded structure light image is projectedonto a surface of a measurement target; left and right deformation color coded images after profile modulation by the measurement target are acquired; three left/right deformation grayscale coded images are respectively acquired through separation; pixel correlation matching of the three left/right deformation grayscale coded images acquired through separation is carried out to acquire parallax data, based on the binocular stereo vision principle and the parallax data, three-dimensional reconstruction of the measurement target is carried out to acquire three-dimensional coordinate data of themeasurement target surface.

Description

technical field [0001] The invention relates to the technical field of optical three-dimensional measurement, in particular to a three-dimensional measurement method and system based on color random binary coded structured illumination. Background technique [0002] Optical three-dimensional measurement technology has been widely used in industrial inspection, film and television special effects, medical cosmetology and cultural relics protection and other fields. It illuminates the object to be measured in the measurement space by projecting point, line, and surface structured light fields, and then analyzes the structured light field modulated by the object shape obtained by the camera through a certain image processing method and optical measurement principle, thereby realizing three-dimensional reconstruction. In recent years, due to the remarkable advantages of measurement efficiency, the 3D measurement technology of surface structured light illumination has been widely...

Claims

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Application Information

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IPC IPC(8): G06T7/521G06T7/00G06T17/00G01B11/24
CPCG01B11/2433G06T17/00G06T2200/08G06T2207/10024G06T2207/20228G06T7/521G06T7/97
Inventor 朱江平周佩荆海龙
Owner SICHUAN UNIV
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