Image varification

I want a webpage that you can download folders of 20 images from.

I want each of those images to have 1 or 2 pixels colours inverted.

I want each subsequent download to invert different pixels to the previous downloads.

Would a measly £100 be enough to persuade someone to create such a thing?

>>9
You don't even have to modify the pixel values to fool the duplicate check.
So Yotsuba's MD5 hashes are of the whole file, not just the image data? They're already using ImageMagick which has this built-in, why the hell wouldn't they use it?
Garblegarblegarble.