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Retinal image enhancement in multi-mode histogram
Author(s)
Intajag, Sathit
Tipsuwanporn, Vittaya
Chatthai, Rungrat
Date Issued
November 16, 2009
Type
Conference Paper
Abstract
Evaluation of a retinal image is widely employed to help doctors diagnose many diseases, such as diabetes or hypertension. From acquisition process, retinal images often have low grey level contrast and dynamic range. This paper proposes histogram analysis for solving the problems of retinal image enhancement. The proposed method uses fuzzy set to enhance the images by partitioning the image histogram to multi-modes with derivative equation. Each mode of the histogram is contrasted by finding the optimal crossover point of S-function with an index of fuzziness, which is designed for contrasting a field of view in the images. Our algorithm can achieve a number of properties of an importance for contrast stretching, such as compressed the noise in background and produced a high contrast in the field of view that provide feasibility in diagnosis from a retinal image. © 2008 IEEE.
Citation
2009 Wri World Congress on Computer Science and Information Engineering Csie 2009, 4, 745-749, 2009