Method for automatically extracting image feature points of workpiece with rough grain under the strong reflection background
An image feature point and automatic extraction technology, which is applied to measurement devices, instruments, optical devices, etc., can solve the problem of difficulty in automatic extraction of image feature points of rough texture workpieces, and achieve high automatic extraction accuracy, algorithm stability, and dynamic range. larger effect
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[0022] Such as figure 1 As shown, the method process of the present invention is: first carry out preprocessing such as filtering and denoising to the original collected image, then through the automatic image segmentation and edge extraction based on the gray gradient, the feature points of the image are extracted from the background, and finally the Iterative least squares curve fitting is performed on the feature points, and the analytical form of the feature points corresponding to the surface of the workpiece is calculated.
[0023] y = Σ i = 0 N a i x i , N is the polynomial highest order
[0024] In the formula, i is the number of edge points, (x, y) is the edge point coefficient, and α is the polynomial coefficient to be obtained. Bring the coordinates (x, y) of the ed...
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