Three-dimensional measurement method and system based on color random binary coded structured lighting
A technology of binary coding and structured lighting, applied in measurement devices, details of processing steps, image analysis, etc., can solve the problems of inability to reflect the actual state, low measurement accuracy and spatial resolution, and difficulty in 3D measurement synchronization. The effect of high reliability, high spatial resolution, and high measurement accuracy
Active Publication Date: 2021-02-26
SICHUAN UNIV
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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 state of the moving target at a certain moment, but the integration of a period of time, resulting in striped textures caused by movement on the reconstructed surface. Therefore, for the three-dimensional measurement of fast moving targets There are still problems such as synchronization difficulties, low measurement accuracy and spatial resolution
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[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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The invention discloses a three-dimensional measurement method and system based on color random binary coding structured lighting, which can reduce the influence of color crosstalk on three-dimensional reconstruction, and realize full-resolution dynamic three-dimensional measurement with higher measurement accuracy and higher spatial resolution. The method includes: respectively generating three gray-scale random binary coded images with different pattern distributions; acquiring a color random binary coded structured light image; projecting the acquired color random binary coded structured light image to a measurement target on the surface; obtain the left and right deformed color-coded images modulated by the topography of the measurement target; separate three left and right deformed gray-scale coded images; perform pixel correlation matching on the separated left and right deformed gray-scale coded images Obtain the parallax data, and perform three-dimensional reconstruction of the measurement target based on the principle of binocular stereo vision and the parallax data, and obtain the three-dimensional coordinate data of the measurement 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...
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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