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Title: Total Variation Based Wavelet Domain Filter for Image Denoising
Authors: Bhoi, N
Meher, S
Issue Date: 2008
Publisher: IEEE
Citation: Proceedings of the first International Conference on Emerging Trends in Engineering and Technology, 2008. ICETET '08.16-18 July 2008 P 20 - 25
Abstract: In this paper the method total variation (TV) is applied on noisy image decomposed in wavelet domain for removal of additive white gaussian noise (AWGN). LL subband of a single decomposed noisy image is used to find the horizontal, vertical and diagonal edges. Using the pixel position of horizontal edges, the corresponding wavelet coefficients in HL subband is retained thresholding others to zero. Adopting the same procedure the vertical and diagonal details of LH and HH subband is retained. The method TV is applied to LL subband for one iteration only. Applying inverse wavelet transform on modified wavelet coefficients we get back the image with little noise. This little noise can be removed using TV filter with single iteration. The method performs well in terms of peak signal to noise ratio (PSNR) over many well known spatial and wavelet domain methods. The method also retains the edges and other detailed information very well.
Description: Copyright for the paper belongs to IEEE
Appears in Collections:Conference Papers

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