how to determine if a picture is explicit [closed]

Question

I'm looking for a way to determine whether a picture is explicit (is Safe For Work ) or not.

I am currently looking for an API that is capable of doing it, but so far I didn't have any success.

One of the ideas I had was to use the google search API and provide a URL to a picture, and looking whether or not it is in the results when safeSearch is enabled, but it will fail on a picture that was added before the crawler got to it.

Alternatively, I'm looking for pointers regarding what to look for in an image to determine how SFW it is. Any suggestions regarding shapes, colors or patterns?

Answer 1

As promised, a SFW paper from Google researchers and a patent for your study procured from this blog entry.