The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
Sakari Murtovaara, Esko Juuso, Raimo Sutinen, 1996. Fuzzy 
logic Edge Detection Algorithm. Proceeding AVISP’96, pp. 
423-426. 
T.Chen, Q.H.Wu, R.Rahmani-torkaman, J.Hughes, 2002. A 
pseudo top-hat mathematical morphological approach to edge 
detection in adavk regions. Pattern Recognition, 25(1), pp. 
199-210. 
Tony F.Chan, Luminita A. Vese, 2001. Active Contourswithout 
Edges. IEEE transactions on image processing, 10(2),pp. 
266-276. 
V.Srinivasan, P.Bhatia, S.h. Ong, 1994. Edge detection using 
anural network. Pattern Recognition. 27(12), pp. 1653-1162 
Xie fengying, Jiang Zhiguo, 2007. Double thresholding for 
immune cell image based on maximum variance theory. 
Chinese journal of Stereology and Image Analysis, 12(1), pp. 
59-61. 
Yang Xin, 2003. Theory and Application of Partial 
DifferentialEquations in Image Processing. Shanghai Jiaotong 
UniversityPress, pp.84-101 
Ye zhou,Jhon Starkey, Lalu, 2004. Mansinha,Segmentation of 
petrographic images by intergrating edge detection and region 
growing. Computers &Geosciences, 30(8), pp. 817-831. 
ACKNOWLEDGEMENT 
Thanks are given to CNNSF (Grant No. 40601071), the Key 
Projects of Science and Technology Commission of Shanghai 
Municipality (06DZ12302) and (072312032), for jointly support 
of this study