Free Machine Learning Library for .NET

Minor trivia - Just in case you find the woman in the test image is seemingly looking at you in a provocative manner, it is because the original source image is from a Playboy photo, published in 1972. Its usage as a test image has stirred controversy for a number of years:

https://en.wikipedia.org/wiki/Lenna

http://tech.velmont.net/the-lena-standard-test-image-full-ve... NSFW

I think the only mature, sensible response to the Lenna "controversy" was that of Deanna Needell and Rachel Ward, who published an image-processing paper using a test image of Fabio instead.

They have an excellent tutorial [0] that shows using Accord.NET to implement a well known paper called "A tutorial on Principal Components Analysis" [1]. I highly recommend reading them both for anyone who doesn't know much about that field because they give a very good idea of how stuff like facial recognition, image compression, ...etc work.

[0]: http://arxiv.org/abs/1210.7463 [1]: http://www.cs.otago.ac.nz/cosc453/student_tutorials/principa...

Does it work with mono?

Yes, it does.

Source and build instructions: https://github.com/accord-net/framework