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Re:Vibrant.js: Extract prominent colors from an image by jgrowl on Tuesday May 26, 2015 @03:04PM (#9606906)
Neat! This reminds me of my fiancée's project:

http://steamy-screenshots.herokuapp.com/

https://github.com/moneypenny/steamy-screenshots

You can specify a steam username or game title and it will pull in screenshots and use the extracted colors to style the page.

I think she used a port of Panic's iTunes album art color algorithm. I am not sure if she had heard of Vibrant.js or not.

Re:Vibrant.js: Extract prominent colors from an image by Raed667 on Tuesday May 26, 2015 @04:27PM (#9607418)
Reminds me of something similar I have done for a "machine vision" course using OpenCV (C++).[1]

The basic idea is to get the histogram and check for dominant colors.

(There are other implemented features as well, like texture, if you're interested)

[1]https://github.com/RaedsLab/Comparify