I have been working on color search before and there are a few things they did implement in a suboptimal fashion at best. For one I would choose http://en.wikip

I have been working on color search before and there are a few things they did implement in a suboptimal fashion at best. For one I would choose http://en.wikipedia.org/wiki/Lab_color_space http://en.wikipedia.org/wiki/Lab_color_space or http://en.wikipedia.org/wiki/CIECAM02 http://en.wikipedia.org/wiki/CIECAM02 These colorspaces are made for similarity search. Additionally I would use a CNN http://en.wikipedia.org/wiki/K-nearest_neighbors_algorithm#CNN_for_data_reduction http://en.wikipedia.org/wiki/K-nearest_neighbors_algorithm#C...