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

Table 1

Corresponding relationship between the size of image patch and the number of sampling points.

Patch size (×10^4 pixels)	0.2~0.8	0.8~2	2~4	4~6	6~9	9~12	12~15	15~
# sampling points	16	32	48	64	80	96	112	128