전자공학회논문지 (Journal of the Institute of Electronics and Information Engineers)

  • 제51권2호
  • /
  • Pages.156-160
  • /
  • 2014
  • /
  • 2287-5026(pISSN)
  • /
  • 2288-159X(eISSN)
대한전자공학회 (The Institute of Electronics and Information Engineers)
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Determination of Noise Threshold from Signal Histogram in the Wavelet Domain

  • Kim, Eunseo (Department of Electronics Engineering, Ewha Womans University) ;
  • Lee, Kamin (Department of Electronics Engineering, Ewha Womans University) ;
  • Yang, Sejung (Ewha Womans University, Medical Center) ;
  • Lee, Byung-Uk (Department of Electronics Engineering, Ewha Womans University)
  • 투고 : 2013.10.10
  • 발행 : 2014.02.25
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초록

Thresholding in frequency domain is a simple and effective noise reduction technique. Determination of the threshold is critical to the image quality. The optimal threshold minimizing the Mean Square Error (MSE) is chosen adaptively in the wavelet domain; we utilize an equation of the MSE for the soft-thresholded signal and the histogram of wavelet coefficients of the original image and noisy image. The histogram of the original signal is estimated through the deconvolution assuming that the probability density functions (pdfs) of the original signal and the noise are statistically independent. The proposed method is quite general in that it does not assume any prior for the source pdf.

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참고문헌

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