How to reduce the number of colors in an image with OpenCV?

StackOverflow https://stackoverflow.com/questions/5906693

Question

I have a set of image files, and I want to reduce the number of colors of them to 64. How can I do this with OpenCV?

I need this so I can work with a 64-sized image histogram. I'm implementing CBIR techniques

What I want is color quantization to a 4-bit palette.

No correct solution

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