Log-Spiral Keypoint: A Robust Approach toward Image Patch Matching

Figure 4

The Log-Spiral sampling pattern with points. The small pink circles denote the positions of sampling points; the bigger, blue circles are drawn at a radius corresponding to the standard deviation of the Gaussian kernel used to smooth the intensity values at the receptive fields on the pattern. (a) Standard sampling pattern (). (b) Sampling pattern rotated (). (c) Sampling pattern rotated and resized ().

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