Mixed image processing process of structure light striation central line extraction
A light stripe center and processing method technology, which is applied in image data processing, image analysis, and the use of optical devices, can solve problems such as difficult to quickly extract the centerline of light stripes, a large amount of calculation, and difficulty in meeting real-time requirements. Improve real-time performance, reduce redundant calculations, and avoid the effect of large template Gaussian convolution operations
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[0019] The present invention will be described in further detail below. First, the basic principle of the stripe center extraction method based on Hessian matrix is briefly introduced.
[0020] The basic idea of the fringe center extraction algorithm based on the Hessian matrix is as follows: first, take any point on the light strip, calculate the Hessian matrix of the point, select the eigenvector corresponding to the maximum eigenvalue of the Hessian matrix as the normal direction of the point, and then In the normal direction, Taylor expansion is used to obtain the sub-pixel coordinates of the center pixel point on the stripe, and the center points belonging to the same stripe are connected to form the stripe center line.
[0021] The normal direction of the fringe is the direction where the absolute value of the second-order directional derivative in the image z(x, y) (where x, y are the horizontal and vertical coordinates of the image respectively) takes the maximum...
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