Anisotropic characteristic descriptor based image stitching method
A feature descriptor, anisotropic technology, applied in the field of image information processing, can solve problems such as poor robustness, decreased matching accuracy, and the impact of binary descriptor matching performance.
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[0054] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.
[0055] A. Detect the reference image and the image to be registered (see attached Figure 5 (a) and 5(b)) feature points, and calculate the main direction of the feature points.
[0056] A1. Do grayscale processing on the reference image and the image to be registered first, and use the approximate value image of the determinant of the Hessian matrix to construct a Gaussian pyramid space. See formula (1) (2) for specific operation.
[0057] A2. Search for feature points in the 3×3×3 spatial neighborhood of each adjacent layer in the same group, and perform sub-image interpolation in the scale space to obtain the exact position coordinates of the feature points.
[0058] A3. Make a circle with the feature point as the center and 6δ as the radius, and calculate the Haar wavelet response of any point on the circular area with a size of 4δ in the x...
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