[1] [1] Bezdek J C,Chandrasekhar R,Attikiouzel Y.A geometric approach to edge detection[J].IEEE Transaction on Fuzzy Systems,1998,6(1) :52-75.

[2] [2] Ho K H L.FEDGE-fuzzy edge detection by fuzzy categorization and classification of edges[A].In:International Joint Conference on Artificial Intelligence Workshop[C].Canada:Montreal,1995.182-196.

[3] [3] Russo F.FIRE operators for image processing[J].Fuzzy Sets and Systems, 1999,103 ( 2 ): 965 -275.

[4] [4] Cheung K F,Chan W K.Fuzzy one-mean algorithm for edge detection[A].IEEE International Conference on Fuzzy Systems[C].Japan: Yokohama, 1995.2039-2044.

[5] [5] Kuo Y H, Lee C S,Liu C C.A new fuzzy edge detection method for image enhancement[A].IEEE International Conference on Fuzzy Systems [C]. Spain:Barcelona, 1997. 1069-1074.

[8] [8] Kittler J,Illingworth J.Minimum error thresholding[J].Pattern Recognition, 1986,19 ( 1 ): 41-47.

[9] [9] Gonzalez R C,Wintz P.Digital image processing[M].MA:AddisonWesley Publishing Company,1987.

[10] [10] Sun W,Xia L Z.A new fuzzy edge detection algorithm[J].Joumal of Southeast University,2003,19(3):132-136.