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LMMSE-Based Image Denoising in Nonsubsampled Contourlet Transform Domain

  • Md. Foisal Hossain
  • Mohammad Reza Alsharif
  • Katsumi Yamashita
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6134)

Abstract

This paper proposes a nonsubsampled contourlet transform (NSCT) based multiscale linear minimum mean square-error estimation (LMMSE) scheme for image denoising. The contourlet transform is a new extension of the wavelet transform that provides a multi-resolution and multi-direction analysis for two dimension images. The NSCT expansion is composed of basis images oriented at various directions in multiple scales, with flexible aspect ratios. Given this rich set of basis images, the NSCT transform effectively captures smooth contours that are the dominant feature in natural images. To investigate the strong interscale dependencies of NSCT, we combine pixels at the same spatial location across scales as a vector and apply LMMSE to the vector. Experimental results show that the proposed approach outperforms wavelet method and contourlet based method both visually and in terns of the peak signal to noise ratio (PSNR) values at most cases.

Keywords

Denoising NSCT LMMSE PSNR 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Md. Foisal Hossain
    • 1
  • Mohammad Reza Alsharif
    • 1
  • Katsumi Yamashita
    • 2
  1. 1.Department of Information EngineeringUniversity of the RyukyusOkinawaJapan
  2. 2.Graduate School of EngineeringOsaka Prefecture UniversityOsakaJapan

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