Figure 6: (a) Matching of images. The relationship between recall rates (with false positive rate less than 3 percent overall) and speed (Seconds-Per-Frame) with different proportions of subregions assigned as “unimportant” regions. (b) The true positive rates for correctly estimating the homography geometry for panorama stitching, with different proportions of
subregions set as “unimportant” regions.