/a/ in need of some dire help

Dear /prog/enitors.

We need your help.

Some idiot script kiddie has written a script that spams /a/ with the same image rotated by 90 degrees.  at the moment it is fucking the mods over because the content is changing therefore they cant ban by ip.

What im asking is for you guys to come up with a way to combat this spam.  Cheers

>>66
Hey everyone I know nothing about hashing and how it works!
>>51
Hey everyone I know nothing about human nature and how it works!
>>54
Hey everyone I know nothing about the 4chan duplicate image detection and how it works!

To any EXPERT PROGRAMMER the solution is quite obvious. A customized hashing algorithm that is not commutative and simply takes generalizations about the image as the hash input. i.e.: average hue of each group of 10x10 pixels (perhaps not the best example, I don't really know what hue is or how likely images are to share have the same frequency for hue values of said blocks but you get the point).