posted 19 years ago
If the big image contains an exact duplicate of the smaller image, with no rotation, distortion, or changes in color and intensity, then it should be pretty easy to do a pixel-by-pixel comparison, much as Ken described in the other link. If the bytes are not exactly the same though, this becomes much harder, and we'd need a lot more information about what kinds of errors are acceptable.
"I'm not back." - Bill Harding, Twister