The Removal of Unknown Image Blurs by Homomorphic Filtering.
UTAH UNIV SALT LAKE CITY COMPUTER SCIENCE DIV
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The report describes a homomorphic method for the estimation and removal of unknown image blurs, which are presumed to have been caused by a linear stationary system. Previous methods have required a more or less perfect a priori knowledge of the identity of the blur. The method described here requires no information about the original scene which led to the blurred image, but does presently require that the blur be phaseless for best results. The estimation method uses a homomorphic mapping to map sections of the blurred image, which is a convolutional combination of the undistorted image and the blur, into a domain the log spectrum in which the components corresponding to the undistorted image and blur are added. Modified author abstract
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