Coded Images

[a740g]

I tried it out, loading an image, encoding a string and then doing _SAVEIMAGE on it. Then reloading the saved version and decoding. It worked fine on a PNG, but I get a null string when trying it on a JPG. Haven't tried any others.

I like it as a crypto exercise.

JPEG images lack the alpha channel. BMP should work. TGAs alpha channel implementation is a bit weird, I think. So, not sure about that one.