Optimal multilevel thresholding using bacterial foraging algorithm

Authors:
P. D. Sathya;R. Kayalvizhi
Affiliations:
Department of Electrical Engineering, Faculty of Engineering and Technology, Annamalai University, Chidambaram 608 002, Tamilnadu, India;Department of Instrumentation Engineering, Faculty of Engineering and Technology, Annamalai University, Chidambaram 608 002, Tamilnadu, India
Venue:
Expert Systems with Applications: An International Journal
Year:
2011

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Abstract

The conventional multilevel thresholding methods are efficient for bi-level thresholding. However, they are computationally expensive extending to multilevel thresholding since they exhaustively search the optimal thresholds to optimize the objective functions. To overcome this drawback, a bacterial foraging (BF) algorithm based multilevel thresholding is presented in this paper. The BF algorithm is used to find the optimal threshold values for maximizing the Kapur's and Otsu's objective functions. The feasibility of the proposed BF technique has been tested on ten standard test images and benchmarked with particle swarm optimization algorithm (PSO) and genetic algorithm (GA). Experimental results of both qualitative and quantitative comparative studies for several existing methods illustrate the effectiveness and robustness of the proposed algorithm.