Our greatest challenge and also the most interesting aspect of the project came with grayscale images. The DSP Pictomaniacs had Waldo in mind when we originally chose our topic, and we wanted to try to make something like that work.
We chose an image that was similar to Where's Waldo in a lot of ways, but this one uses more colors and also is a little bit less complicated.
(We just used a little snippet of a picture due to the processing time required.)
We were looking for one little monster in particular in this image. Here's a closeup of him:
It is a bit of a challenge to write an algorithm that would allow Matlab to do that is a bit tricker. In the end, we did accomplish just that. He's a screen capture of the result:
It's a bit hard to see, but there is definately one single white dot at the location of that little monster's head!
So, you can tell that our code does work on all different kinds of images. It has limitations, of course (as described in Conclusions section), but it works in the scope that we had intended.