Get image top 10 colors

Question

I am generating color pallete for image through octree quantization. Its gives me maximum 256 colors for any image. Now i want to show only top 10 ( according to the quantity of color in image ) colors of the image out of these 256 colors. How can i do this in c#?

Answer 1

Create a histogram, that is, count the number of pixels mapped to each color in the picture, then sort it in descending order and take the 10 first elements of the sorted array.