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Automatic Histogram Threshold Using Fuzzy Measures

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4 Author(s)
Lopes, N.V. ; Dept. of Electr. Eng., Escola Super. de Tecnol. e Gestao-IPL, Leiria, Portugal ; Mogadouro do Couto, P.A. ; Bustince, H. ; Melo-Pinto, P.

In this paper, an automatic histogram threshold approach based on a fuzziness measure is presented. This work is an improvement of an existing method. Using fuzzy logic concepts, the problems involved in finding the minimum of a criterion function are avoided. Similarity between gray levels is the key to find an optimal threshold. Two initial regions of gray levels, located at the boundaries of the histogram, are defined. Then, using an index of fuzziness, a similarity process is started to find the threshold point. A significant contrast between objects and background is assumed. Previous histogram equalization is used in small contrast images. No prior knowledge of the image is required.

Published in:

Image Processing, IEEE Transactions on  (Volume:19 ,  Issue: 1 )

Date of Publication:

Jan. 2010

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