Y. Song-lie, China theory and practice of wheat cultivation. Shanghai. Shanghai science and Technology Press, 2006.

H. Di, C. Li-dong, and X. Yu-feng, Experimental Study on the Factors of Seeding Quality about Air-suction Metering Device, Journal of Agricultural Mechanization Research, vol.179, pp.1-175, 2006.

. I. Sezanm, A Peak Detection Algorithm and its Application to Histogram Based Image Data Reduction. Graphical Model sand Image Processing, pp.47-59, 1985.

J. Yun-de, Machine Vision, 2000.