H. Xingyi, F. Ruming, and W. Shouyi, Progress in research of detection method for degree of rice milling, Journal of JiangSu University of science and technology, issue.93, pp.6-9, 1998.

T. Qingguo, Application of the computer image processing technique in discerning the degree of rice whiteness, Cereal and Feed Industry, pp.10-11, 1997.

X. Li, Q. Minjuan, and F. Ruming, Image process technique to cognize the external qualities and mil-ling degree of rice[J]. Transactions of the chinese society of agricultural Engineering, pp.12176-179, 1996.

Z. Hao, M. Yongcheng, and Z. Zhanming, Compounds, quantitative analyzing rice milling degree based on digital image technology, Journal of the Chinese Cereals and Oils Association, pp.187-190, 2006.

L. Boyu, Study of image texture analysis and classification method, 2007.

S. Wen and L. Jian, Image texture analysis methods and recent advances[J]. Radio Engine-ering, pp.288-301, 1998.

H. Jiguang, Gray level-gradient co-occurrence matrix texture snalysis method, Acta Automatica Sinica, vol.10, issue.1, pp.22-25, 1984.

Z. Chong and G. Qiang, Fisher discrimination method and its application, Journal of Southwest Jiaotong University, vol.43, issue.1, pp.136-141, 2008.