This software is free for non-commerical use: http://koen.me/research/colordescriptors/ http://koen.me/research/colordescriptors/ You can find other implementa

This software is free for non-commerical use: http://koen.me/research/colordescriptors/ http://koen.me/research/colordescriptors/ You can find other implementation of varying quality if you Google for Bag of Visual Words. For the final classification, I would recommend scikit-learn.