The machine is widely used in many fields such as Korean color sorting, the food industry of rice, coarse cereals (beans), tea class color grading, some chemical industry industry (plastic sheet, plastic particles, salt, etc.) can also be used. The machine is a microcomputer to take pictures of materials, according to the picture of intelligent sorting. For general consumers, which can distinguish, for some basic epigenetic factors, so rice color and merchandise sales, bound together in a common cause. During the storage of rice, due to the heating and other reasons, it will make a part of rice, become yellow rice. Yellow grain rice contains harmful ingredients to the human body, the finished rice containing yellow grain rice not only affect the value of rice, but also affect the health of consumers, should be eliminated as far as possible. Because there is no difference between the general physical properties of yellow rice and normal rice, can not be removed by conventional cleaning method, can only use the yellow rice and rice in color, different reflection rate, using photoelectric method and equipment of color to be removed.