6 sys.stderr.write("usage: icom FILE1 FILE2\n")
14 f = open(sys.argv[i + 1])
16 for y in xrange(tsz[1]):
18 for x in xrange(tsz[0]):
29 for y in xrange(tsz[1]):
30 for x in xrange(tsz[0]):
31 p = [f[y][x] for f in files]
33 sum += abs(p[0][c] - p[1][c])