Q. Jian, L. Lin, L. Shaoming, W. Longhe, and S. Zhentong, New image segmentation method based on gradient, Journal of Computer Applications, issue.8, pp.29-2071, 2009.

L. Vincent and . Member, Morphological Gray scale Reconstruction in Image Analysis: Applications and Efficient Algorithms, IEEE Transactions on image processing, vol.2, issue.2, pp.583-598, 1993.
DOI : 10.1109/83.217222
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.88.3967

L. Vincent and P. Soille, Watersheds in digital spaces: an efficient algorithm based on immersion simulations, IEEE Transactions on Pattern Analysis and Machine Intelligence, vol.13, issue.6, 1991.
DOI : 10.1109/34.87344
URL : http://biometrics.cse.msu.edu/PRIPSeminar/Watershed/91VincentWatershed.pdf

W. Kassm and D. Terzopoulos, Snakes: active contour models, International Journal of ComputerVision, vol.1, issue.4, pp.321-331, 1987.

T. Chan and L. Vese, An efficient variation multiphase motion for the Mumford-Shah segmentation model, Processing of Asiomar Conference Signals, Systems, and Computers, pp.490-494, 2000.
DOI : 10.1109/acssc.2000.911004

B. Xun-yi, Y. Guanjun, and . Qinghua, Automatic Segmentation of Touching Corn Kernels in Digital Image, Transactions of the Chinese Society for Agricultural Machinery, p.4033, 2010.

Z. Yaqiu, W. Wenfu, and W. Gang, Separation of corn seeds images based on threshold changed gradully, Transactions ofthe CSAE, issue.7, pp.27-200, 2011.

X. Xu, Characteristic analysis of Otsu threshold and its applications, Pattern Recognition Letters, vol.32, issue.7, pp.956-961, 2011.
DOI : 10.1016/j.patrec.2011.01.021