J4 ›› 2011, Vol. 38 ›› Issue (6): 152-158+178.doi: 10.3969/j.issn.1001-2400.2011.06.025

• Original Articles • Previous Articles     Next Articles

SAR image thresholding segmentation based on the bacteria foraging algorithm

MA Miao1;LIANG Jianhui1,2;GUO Min1
  

  1. (1. College of Computer Sci., Shaanxi Normal Univ., Xi'an  710062, China;
    2. College of Applied Sci. adn Tech. of Hainan Univ., Danzhou  571737, China)
  • Received:2010-10-08 Online:2011-12-20 Published:2011-11-29
  • Contact: MA Miao E-mail:mmthp@snnu.edu.cn

Abstract:

In order to increase the speed and the accuracy of Synthetic Aperture Radar(SAR) image segmentation, a new thresholding segmentation method is proposed, which integrates the Bacterial Foraging Algorithm (BFA) and two-dimensional grey entropy. After the basic BFA is analyzed deeply, the method improves the search speed of the best threshold via shrinking the foraging space of the bacterial swarm. And then, an improved two-dimensional grey entropy model is regarded as the fitness function of our optimized BFA. Finally, the best threshold is located gradually and quickly by three behaviors of the bacterial swarm, i.e., chemotaxis, and reproduction, elimination and dispersal. Experimental results show that the proposed method is superior to some segmentation methods based on the Genetic Algorithm (GA) and Artificial Fish Swarm Algorithm (AFSA) in convergence, stability and segmentation effects.

Key words: image segmentation, bacterial foraging algorithm, global optimization, SAR image

CLC Number: 

  • TP391.41,N941.5