On the back-ground and research platform of four-legged robot soccer competition,this article provides a method to improve the manually created color table.

The main task ofcolor quantization is to approximate an image of N pixels with no more than K(K<<N)colors so that the image could be output on a display device with a color palette of onlyK items.

Discussion on the relationship of hot rolling parameters with surface color of plate;

A new algorithm of image retrieval based on dominant color set is presented.