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Denoising Images by VisuShrink Technique Using the Estimated Noise Power in the Highest Equal Subband of Wavelet  

Park, Nam-Chun (경남대학교)
Woo, Chang-Yong (경남대학교)
Publication Information
Journal of the Institute of Convergence Signal Processing / v.13, no.1, 2012 , pp. 26-31 More about this Journal
Abstract
The highest frequency band of wavelet decomposition band is divided into 4 equal subbands and by the minimum power of the subbands and by the monotonic transform, the level adapted threshold is obtained. The adapted threshold is applied to the soft threshold technique to denoise high and middle frequency band noise of image signals. And the results of PSNRs are compared with the results obtained by the VisuShrink technique and by the technique using the monotonic transform and the weight value. The results showed the validity of this technique.
Keywords
VisuShrink; Estimation; Variance; Soft-threshold; Monotonic transform; Equal subband; Wavelet transform; Weight value; High frequency band;
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