Abstract
Threshold selection is a challenging job for the image denoising in the contourlet domain. In this paper, a new local threshold with adaptive window shrinkage is proposed. According to the anisotropic energy clusters in contourlet subbands, local adaptive elliptic windows are introduced to determine the neighboring coefficients with strong dependencies for each coefficient. Utilizing the maximum likelihood estimator within the adaptive window, the signal variance is estimated from the noisy neighboring coefficients. Based on the signal variance estimation, the new threshold is obtained in the Bayesian framework. Since it makes full use of the captured directional information of images, the threshold extends to the anisotropic spatial adaptability and behaves reliably. Simulation experiments show that the new method exhibits better performance than other outstanding wavelet and contourlet denoising schemes obviously, both in the PSNR value and the visual appearance.
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Fu S J, Zhang C M, Tai X C. Image denoising and deblurring: non-convex regularization, inverse diffusion and shock filter. Sci China Inf Sci, 2011, 54: 1184–1198
Romberg J K, Wakin M B, Baraniuk R G. Multiscale geometric image processing. In: Proceedings of VCIP, Lugano, 2003. 1265–1272
Rahman S M M, Hasan M K. Wavelet-domain iterative center weighted median filter for image denoising. Signal Process, 2003, 83: 1001–1012
Chen GY, Bui TD, Krzyżak A. Image denoising with neighbour dependency and customized wavelet and threshold. Patt Recog, 2005, 38: 115–124
Zhao R Z, Liu X Y, Li C C. Wavelet denoising via sparse representation. Sci China Ser F-Inf Sci, 2009, 52: 1371–1377
Chang S G, Yu B, Vetterli M. Adaptive wavelet thresholding for image denoising and compression. IEEE Trans Image Process, 2000, 9: 1532–1546
Nasri M, Nezamabadi-pour H. Image denoising in the wavelet domain using a new adaptive thresholding function. Neurocomputing, 2009, 72: 1012–1025
Do M N, Vetterli M. The finite ridgelet transform for image representation. IEEE Trans Image Process 2003, 12, 16–28
Starck J L, Candes E J, Donoho D L. The curvelet transform for image denoising. IEEE Trans Image Process, 2002, 11: 670–684
Do M N, Vetterli M. The contourlet transform: an efficient directional multiresolution image representation. IEEE Trans Image Process, 2005, 14: 2091–2106
Shan H, Ma J W, Yang H Z. Comparisons of wavelets, contourlets and curvelets in seismic denoising. J Appl Geophys, 2009, 69: 103–115
Wang X H, Chen M Y, Song C M, et al. Contourlet HMT model with directional feature. Sci China Inf Sci, 2012, 55: 1563–1578
Shen X H, Zhang C M. Texture image segmentation based on contourlet-domain contextual hidden Markov tree model. ICIC Express Lett, 2011, 5: 3707–3712
Zhang X, Jing X L. Image denoising in contourlet domain based on a normal inverse Gaussian prior. Digit Signal Process, 2010, 20: 1439–1446
Da Cunha A L, Zhou J P, Do M N, The nonsubsampled contourlet transform: theory, design and application. IEEE Trans Image Process, 2006, 15: 3089–3101
Eom I K, Kim Y S. Wavelet-based denoising with nearly arbitrarily shaped windows. IEEE Signal Process Lett, 2004, 11: 937–940
Shui P L. Image denoising algorithm via doubly local wiener filtering with directional windows in wavelet domain. IEEE Signal Process Lett, 2005, 12: 681–684
Chang S G, Yu B, Vetteri M. Spatially adaptive wavelet thresholding with context modeling for image denosing. IEEE Trans Image Process, 2000, 9: 1522–1531
Boykov Y, Veksler P, Zabih R. A variable window approach to early vision. IEEE Trans Patt Anal Mach Intell, 1998, 20: 1283–1294
Long Z L, Younan N H. Statistical image modeling in the contourlet domain using contextual hidden Markov models. Signal Process, 2009, 89: 946–951
Po D D Y, Do M N. Directional multiscale modeling of images using the contourlet transform. IEEE Trans Image Process, 2006, 15: 1610–1620
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Shen, X., Wang, K. & Guo, Q. Local thresholding with adaptive window shrinkage in the contourlet domain for image denoising. Sci. China Inf. Sci. 56, 1–9 (2013). https://doi.org/10.1007/s11432-013-4988-1
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DOI: https://doi.org/10.1007/s11432-013-4988-1