Journal of Shanghai Jiaotong University ›› 2012, Vol. 46 ›› Issue (06): 892-899.

• Radiao Electronics, Telecommunication Technology • Previous Articles     Next Articles

Image Thresholding Based on 2-D Histogram θ-Division and Minimum Error

 WU  Yi-Quan-1, 2 , ZHANG  Xiao-Jie-1, WU  Shi-Hua-1, ZHANG  Guo-Hua-2, ZHANG  Sheng-Wei-2, YU  Su-Fen-2   

  1. (1. College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2. Science and Technology on Electro-optic Control Laboratory, Luoyang 471009,Henan,China)
  • Received:2011-05-06 Online:2012-06-28 Published:2012-06-28

Abstract: Aiming at the problem of wrong segmentation in common 2-D histogram region division, in order to meet the requirement of different images and segmentation objectives, the 2-D linear-type minimum error threshold segmentation method was generalized, and a much more widely suitable thresholding method was proposed based on 2-D histogram θ-division and minimum error. The threshold selection formulae and its fast recursive algorithm  were deduced. The influence of different θ values on segmented results and running time was analyzed according to the experimental results. Compared with the conventional 2-D minimum error method, the proposed method not only achieves more accurate segmented result and more robust anti-noise, but also significantly reduces the running time. The linear-type minimum error threshold segmentation method is only a special case with θ=45° of the proposed method.

Key words: image processing, thresholding, 2-D histogram region θdivision, minimum error, recursive algorithm

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