Fuzzy Sets
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History

„... a pictorial object is a fuzzy set which is specified by some membership function defined on all picture points. From this point of view, each image point participates in many memberships. Some of this uncertainty is due to degradation, but some of it is inherent…In fuzzy set terminology, making figure/ground distinctions is equivalent to transforming from membership functions to characteristic functions.“ 1970, J.M.B. Prewitt

1965, Zadeh	Introduction of Fuzzy Sets
1966, Zadeh et al.	Patern Recognition as interpolation of membership functions
1969, Ruspini	Concept of Fuzzy Partitioning
1970, Prewitt	First Approach toward Fuzzy Image Understanding
1973, Dunn, Bezdek	First Fuzzy Clustering algorithm (FCM)
1977, Pal	Fuzzy Approach to Speech Recognition
1979, Rosenfeld	Fuzzy Geometry
1980-1986, Rosendfeld et al., Pal et al.	Extension of Fuzzy Geometry, New methods for enhancement / segmentation
End of 80s-90s Dave/Krishnapuram/Bezdek Russo/Krishnapuram Bloch et al. / Di Gesu / Sinha et al./De Baets / and many others...	Different Fuzzy Clustering algorithms, Rule-based Filters, Fuzzy Morphology

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H. R. Tizhoosh

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Created: June 1997
Updated: Nov 2004