【单选题】Contrast stretching is a process that expands the range of intensity levels in an image so that it spans the full intensity range of the recording medium or display device 。Fig.1 shows a typical tran...
A.
(r1, s1) = (rmin, 0) and (r2, s2) = (rmax, L - 1)
B.
(r1, s1) = (m, 0) and (r2, s2) = (m, L - 1), where m is the mean intensity level in the image