Image Restoration Using Gaussian Scale Mixtures
in the Wavelet Domain
Published in:
Proc. 10th IEEE Int'l Conf on Image Processing
Barcelona, Spain. September 2003.
© IEEE Computer Society.
Related full-length journal paper:
Image denoising using a scale mixture of Gaussians in the wavelet domain, Fall 2003.
We describe a statistical model for images decomposed in an overcomplete
wavelet pyramid. Each neighborhood of pyramid coefficients is modeled as
the product of a Gaussian vector of known covariance, and an independent
hidden positive scalar random variable. We propose an efficient Bayesian
estimator for the pyramid coefficients of an image degraded by linear
distortion (e.g., blur) and additive Gaussian noise. We demonstrate the
quality of our results in simulations over a wide range of blur and noise
levels.
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