[1] Pal S K,King R A,Hashim A A.Automatic graylevel thresholding through index of fuzziness and entropy.Pattern Recognition Letter,1983,1:141~146
[2] Murthy C A,Pal S K.Histogram thresholding by minimizing graylevel fuzziness.Information Sceices,1992,60:107~135
[3] Murthy C A,Pal S K.Bound for membership function: A correlation-based approach.Information Sceices,1992,65:143~171
[4] Murthy C A,Pal S K.Fuzzy thresholding: mathematic frame work,bound functions and weighted moving average technique.Pattern Recognition Letter,1990,11:197~206