6 sys.stderr.write("usage: icom FILE1 FILE2\n")
13 f = open(sys.argv[i + 1])
15 for y in xrange(tsz[1]):
17 for x in xrange(tsz[0]):
28 for y in xrange(tsz[1]):
29 for x in xrange(tsz[0]):
30 p = [f[y][x] for f in files]
32 sum += abs(p[0][c] - p[1][c])