An Improved Adaptive Smoothing Method

  • Authors:
  • Xin Hu;Hui Peng;Joseph Kesker;Xiang Cai;William G. Wee;Jing-Huei Lee

  • Affiliations:
  • Microsoft Corporation, Redmond, Washington, United States 98052;Advantest America, INC, Santa Clara, United States 95054;Sheet Dynamic Ltd., Cincinnati, United States 45212;Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, United States 45221;Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, United States 45221;Department of Biomedical Engineering, University of Cincinnati, Cincinnati, United States 45221

  • Venue:
  • ICIAP '09 Proceedings of the 15th International Conference on Image Analysis and Processing
  • Year:
  • 2009

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Abstract

An improvement of the Chen's method has been provided through the calculation of a more accurate H map. The H map is the pixel's contextual inhomogeneity value reflecting its proximity position with respect to an edge feature, and a more accurate H value leads to the more accurate smoothing speed for the pixel. While experiments on 5 real images show slight improvements in SNRs of our method over that of the Chen method, edge features preserving capability has been enhanced with low FARs (false alarm rates) for edge feature extracted from applying the Sobel filter to the image. Furthermore, parameter values have been determined through an exhaustive searching process resulting in the suggestions of h=0.4 and T=4 for practical applications where the original noise free image is not available and/or no viewer to visually make a selection of the final smoothed image as the output.