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

Figure 3

Conceptualization of Log-Spiral sampling pattern for the multiscale corner keypoint detection: (a) the image pyramid and the multiscale discrete circles, (b) the comparison of sampling point distribution on 4 multiscale discrete circles and a discrete Log-Spiral curve, and (c) the Log-Spiral sampling pattern used to detect the multiscale corner keypoints.

(a)

(b)

(c)