I guess you could call it „digital conceptual blatant art“ (DCBA). I’ve taken a picture of a chameleon and subjected it to four pixel based operations (modes) and sorted them in rising file size / randomness:

Don’t worry if you do not find the chameleon in modes #1, #3 and #4 but once you’ve found it in mode #2 you can not „unsee“ it! You’ll find the sketch on GitHub – and maybe you’ll invent even more modes 😉