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- W2127192017 abstract "Many real word images are contaminated by noise. The noise not only degrades image quality but may also hinder further processing operations. Noise reduction techniques aim to both improve image quality and to aid further image processing. Spatial noise reduction techniques based on the discrete wavelet transform have been widely researched. This paper considers an undecimated shift invariant filter bank that has been used to decompose the image into components. The basic filters are derived from a biorthogonal wavelet basis. Reconstruction is obtained by a simple summation of the image components. A new thresholding scheme, which is obtained from Bayesian estimator theory, is used. The threshold parameters for each component are dependent on the noise level and are selected using a preliminary training procedure. The cost function utilised for the training is a weighted version of the mean square error which is designed to reflect human perception. The method compares favourably with other wavelet based noise reduction techniques and demonstrates significant noise reduction and visual quality enhancement." @default.
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- W2127192017 date "2002-11-11" @default.
- W2127192017 modified "2023-09-25" @default.
- W2127192017 title "An innovative approach for spatial video noise reduction using a wavelet based frequency decomposition" @default.
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- W2127192017 doi "https://doi.org/10.1109/icip.2000.899350" @default.
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