Nude.js | Nudity detection with JavaScript and HTMLCanvas

[burgerbrain]

Now if only they would make one that detected violent and hateful content.

You know, things people should actually be concerned about children seeing.

[sliverstorm]

It's just a sample reason, nobody says it's the only use case. What if you run library computers or an internet cafe, and don't want customers browsing porn on your machines? (ethics be damned, they are your machines, you make the rules!)

[ben0x539]

I do not know, I see a more profitable or popular use case for a porn detector than for a violence filter.

[pa7]

you're right but how would you define violent and hateful content? it's not easy. ok, somebody could build a neural network and train it with typical violent content, but violence has too many types

[confuzatron]

I'm hoping someone will implement tiresomelyRightOn.js.

[matthijs]

Even a really close up picture of a face will be seen as nudity. Trying to detect a body (or parts of a body) and determine how much skin is visible would probably be a better approach.

Also quite relevant is this site: http://www.yangsky.com/researches/physicallinguistics/PLUnde... Besides a "breast detector/nipple detector" he also created a couple of weird detectors like a "cowgirl sex position detector" among others. (The link is sfw, the individual detectors are not)

[snowmaker]

Slightly off topic, but does anyone know of a server-side implementation of the same concept? I've been looking for a good one.

[donpark]

combine nude.js with node-canvas at https://github.com/learnboost/node-canvas

[nailer]

Yep, I maintain one. https://github.com/mikemaccana/pyfilter

It's a Python server side client for the cheap-but-paid PIFilter web service.

[sandaru1]

There are some commercial products such as http://pikture.logikit.net/Content

and there are lot of research papers if you are interested in implementing them : http://portal.acm.org/citation.cfm?id=1021261 http://www.springerlink.com/content/e774824834226tv2

[dangrossman]

I wonder how much work it would take to run this server side on node.js. It has a canvas implementation.

[pa7]

The algorithm is mostly based on this paper: http://www.math.admu.edu.ph/~raf/pcsc05/proceedings/AI4.pdf but there are some steps open. I've implemented this algorithm because it's not as hardware intensive as the usual nude detection algorithms (such as searching for specific body parts)

[seanlinmt]

Interesting concept.Scanning through the code, reading just the comments, it seems to base the nude-not-nude decision by the amount of skin shown.

Hmm.. I guess it depends on what your definition of nudity is.

[cookiecaper]

Yeah, the code looks like it determines based on what percentage of the image is "skin". The demo page gives a rather close-up shot of the upper-left of a woman's shoulders/chest. What if someone zooms out a little bit? In my tests it is not doing very well if the subject is not taking up the whole image.

Perhaps a better approach would be attempting to characterize certain features, like nipples/areola or buttocks. That definitely sounds like it would require more intensive processing, though, and be highly dependent on the angle of the image.

I don't really know much about image processing and computational analysis, I just like to pretend I know things.

[nailer]

Indeed, the sample images don't have any edge cases - eg, a small bathing costume, pasties, etc.

Also what about people with unmaintained pubic hair?

Other tools Im familiarmwith do body part detection, which words pretty well, and generates few false positives (that said, when they do occur they tend to be amusing - a pastrami sandwich , for example).

[cabalamat]

> The detection algorithm runs at the client

Thank you. I really want Firefox to be even slower running unnecessary JavaScript.

[burgerbrain]

I'm not sure why this is downvoted. It runs really slow on firefox...

[Mpdreamz]

Wonder what came first, the clever wordplay or the actual feature. Really cool stuff though.

[seejay]

I couldn't help but click on the message :D

pretty useful concept, i must say...

[nailer]

That makes sense: the girl isn't nude. She has a black area over her nipple. If that's detected as nude, a small bathing costume would also be 'nude'.

[iwr]

If you opt out of the nude.js, the pat-down bot gets to fondle your dangling pointers.