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A Fast Image Thresholding Method Based on Chaos Optimization and Recursive Algorithm for Two-Dimensional Tsallis Entropy

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Author(s): Xinming Zhang | Lin Yan

Journal: Journal of Computers
ISSN 1796-203X

Volume: 5;
Issue: 7;
Start page: 1054;
Date: 2010;
Original page

Keywords: image thresholding | two-dimensional (2-D) Tsallis entropy | chaos optimization algorithm (COA) | recursive algorithm

ABSTRACT
The two-dimensional (2-D) maximum Tsallis entropy method often gets ideal segmentation results, because it not only takes advantage of the spatial neighbor information with using the 2-D histogram of the image, but also has some flexibility with a parameter. However, its time-consuming computation is often an obstacle in real time application systems. In this paper, a fast image thresholding method based on chaos optimization and recursive algorithm for 2-D Tsallis entropy is presented. Firstly, improve the traditional chaos optimization algorithm(COA) so that it can get global solution with lower computation load, then  propose a recursive algorithm with the stored matrix variables and prove the equation among Tsallis entropies of four parts in the 2-D histogram, finally combine the improved COA and the recursive algorithm to reduce much computational cost in the process of solving the 2-D maximum Tsallis entropy problem. Experimental results show the proposed approach can get better segmentation performance and has much higher speed.
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