中文

Journal of Applied Sciences ›› 2013, Vol. 31 ›› Issue (6): 619-627.doi: 10.3969/j.issn.0255-8297.2013.06.011

• Signal and Information Processing • Previous Articles     Next Articles

Multi-grid Lattice Boltzmann Method for Anisotropic Image Diffusion

HUANG Bin1, YAN Zhuang-zhi1,2, ZHOU Ming1   

  1. 1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
    2. Institute of Biomedical Engineering, Shanghai University, Shanghai 200072, China
  • Received:2013-02-01 Revised:2013-03-05 Online:2013-11-29 Published:2013-03-05

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Abstract: To augment precision and computing efficiency of traditional Lattice Boltzmann (LB) methods in speckle reduction, this paper proposes a multi-grid LB (M-LB) method. The method automatically realizes anisotropic image diffusion of LB by applying different scales of grid: fine-grids are applied to regions with
obvious gradient change, and coarse-grids applied to regions with tiny gradient change. Experiments were carried out to test the method for speckle noise reduction. The proposed M-LB method was compared to an existing multi-grid method and two traditional LB methods. Natural images, composite images and medical ultrasound images were used. The experiments show that the M-LB method can achieve better denoising results and higher computation efficiency.

Key words: speckle reduction, anisotropic image diffusion, multi-grid, Lattice Boltzmann method

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