Google and Bing got recognition for nudity = large parts of image looks like this... it's quite complicated stuff, not php, require big servers to run and unsure anything opensource exists, it is their property. Possible it requires even pussy and nipples in some way
I see something exists for example this jscript:
http://www.patrick-wied.at/static/nudejs/
https://github.com/pa7/nude.js
http://playground.primalskill.com/nude-js/index.php
and
http://www.warriorhut.org/graphics/p...ornscanner.zip
Some more info:
http://stackoverflow.com/questions/7...ct-porn-images
If anyone will test those script with some images would be interesting, but I suppose they fail very much often and take forever to compute on each image.
Hiring people from india and bangladesh to select by hand would be cheaper and quicker.