Introduction - If you have any usage issues, please Google them yourself
Function: Find the similarity of two images, and then used for image retrieval although a color image containing tens of thousands of colors, but in most cases, the image in a few colors on the cover image as the most prime color. These colors are called primary colors. Some studies suggest that: Use main color generally does not reduce the color matching results. So consider a second-best possible color feature based on clustering the similarity calculation.