Quick and high-precision method for extracting center of structured light stripe

A technology of structured light fringe and extraction method, which is applied in the field of measurement, can solve the problems of large amount of calculation, difficult to quickly extract the center line of structured light fringe, and difficult to meet the real-time requirements of application occasions, so as to reduce the amount of calculation and quickly extract Effect

Inactive Publication Date: 2006-04-26
BEIHANG UNIV
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Problems solved by technology

The main disadvantage of this algorithm is that the amount of calculation is large, it is difficult to quickly extract the ...

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  • Quick and high-precision method for extracting center of structured light stripe
  • Quick and high-precision method for extracting center of structured light stripe
  • Quick and high-precision method for extracting center of structured light stripe

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Experimental program
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Embodiment

[0084] Through experiments, the performances of the original algorithm and the fast algorithm are compared from three aspects of calculation amount, extraction precision and robustness.

[0085] Operational comparison.

[0086] see figure 1 , which is the comparison of the calculation amount of the three implementation methods when the template size is different. Assume that the size of an image with structured light stripes is 768×576, the Gaussian parameter σ=2.5 is selected, and the size of the Gaussian convolution template is n=[8σ]+1. When σ=2.5, n=21. Using real two-dimensional Gaussian convolution to realize the convolution operation of the algorithm is 5n 2 × 768 × 576 = 975421440 times of multiplication and addition; the convolution operation amount of the algorithm realized by convolution separation is 8n × 768 × 576 = 74317824 times of multiplication and addition; the convolution operation amount of the convolution recursive fast implementation algorithm is 8 × 8...

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Abstract

The invention relates to an extraction method of structure optical fringe center, which comprises the following steps: convoluting the z (x ,y) and Gauss differential to obtain rxú¼ryú¼rxxú¼rxyú¼ ryyú

Description

technical field [0001] The invention belongs to measurement technology and relates to the improvement of a method for extracting the center of structured light fringes. Background technique [0002] In the active vision system based on the triangulation measurement principle, the structured light stripes are modulated due to the depth change of the surface of the measured object, and when reflected in the image, distortion occurs. The degree of distortion includes the relative distance between the laser and the CCD camera. Position information and depth information on the surface of the measured object. To obtain this information, the exact location of the center of the light stripe must first be obtained from the image containing the light stripe. Therefore, in structured light vision detection, a very important image processing task is to obtain accurate position information of the center of structured light stripes. Common methods for extracting the centerline of light ...

Claims

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Application Information

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IPC IPC(8): G01B11/00G06T17/00
Inventor 周富强张广军江洁胡坤
Owner BEIHANG UNIV
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