Figure 2.

Vector pair description (l) and corresponding similarity measure score (r). Color coding for the vector pair segments is as follows. Dark gray: k, number of overlapping ‘on’ pixels. Black: n1 −k, number of non-overlapping ‘on’ pixels in image 1. Light gray: n2 − k, number of non-overlapping ‘on’ pixels in image 2. White: N –n1 − n2 + k, total number of ‘off’ pixels. All vectors have length N = 10.