---
created_at: '2013-10-16T11:55:23.000Z'
title: What is the best way to programatically detect porn images? (2009)
url: http://stackoverflow.com/questions/713247/what-is-the-best-way-to-programatically-detect-porn-images/713414
author: romain_g
points: 133
story_text: ''
comment_text: 
num_comments: 107
story_id: 
story_title: 
story_url: 
parent_id: 
created_at_i: 1381924523
_tags:
- story
- author_romain_g
- story_6559071
objectID: '6559071'
year: 2009

---
Akismet does an amazing job at detecting spam comments. But comments are
not the only form of spam these days. What if I wanted something like
akismet to automatically detect porn images on a social networking site
which allows users to upload their pics, avatars, etc?

There are already a few image based search engines as well as face
recognition stuff available so I am assuming it wouldn't be rocket
science and it could be done. However, I have no clue regarding how that
stuff works and how I should go about it if I want to develop it from
scratch.

How should I get started?

Is there any open source project for this going on?