Journal
APPLIED MATHEMATICS AND COMPUTATION
Volume 205, Issue 2, Pages 899-907Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.amc.2008.05.130
Keywords
Histogram; Optimization; Thresholding
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In this paper, an efficient approach to search for the global threshold of image using Gaussian mixture model is proposed. Firstly, a gray-level histogram of an image is represented as a function of the frequencies of gray-level. Then to fit the Gaussian mixtures to the histogram of image, the expectation maximization (EM) algorithm is developed to estimate the number of Gaussian mixture of such histograms and their corresponding parameterization. Finally, the optimal threshold which is the average of these Gaussian mixture means is chosen. And the experimental results show that the new algorithm performs better. (C) 2008 Published by Elsevier Inc.
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