Image analysis – Image enhancement or restoration – Image filter
Reexamination Certificate
2007-03-20
2007-03-20
Bella, Matthew C. (Department: 2624)
Image analysis
Image enhancement or restoration
Image filter
C382S262000
Reexamination Certificate
active
10132451
ABSTRACT:
An digital image input, possibly being either pre-compressed or decompressed, is enhanced; its edges are preserved while any compression artifacts, like blocking and ringing, are simultaneously reduced. The enhancement method enhances images with luminance and chrominance functions, incompletely defined or undefined, on a set of pixels so that the missing information is extrapolated while the image is simultaneously enhanced. The method consists of up to three integrated sub-processes: the image sharpening flow; the de-quantization filtering; and the means of control of the local rate of flow. The image sharpening flow is an iterative nonlinear filtering schema intertwining a local median filter and a suitably chosen linear filter. A local geometric control mechanism allows selective application and adaptation of an algorithm allowing selective removal of local artifacts. De-quantization filtering ensures that the enhancement process does not alter information contained in the image beyond its quantization constraints.
REFERENCES:
patent: 4636845 (1987-01-01), Alkofer
patent: 5359676 (1994-10-01), Fan
patent: 5495538 (1996-02-01), Fan
patent: 5602934 (1997-02-01), Li et al.
patent: 5671013 (1997-09-01), Nakao
patent: 5768440 (1998-06-01), Campanelli et al.
patent: 5910116 (1999-06-01), Ishii
patent: 6334001 (2001-12-01), de Queiroz et al.
patent: 2002/0159648 (2002-10-01), Alderson et al.
Jung, Shi Chang, Paik, Joon Ki, Modified Regularized Image Restoration for Postprocessing Inter-Frame Coded Images, 1999, Image Processing, 1999, ICIP 99.
Jung, Junghoon, Joung, Shichang, Jang, Younhui, Paik, Joonki, Enhancement of Region-of-Interest Coded Images by Using Adaptive Regularization, 2000, Consumer Electronics, 2000, ICCE. 2000 Digest of Technical Papers.
A. J. Ahumada, Jr., R. Horng, “Smoothing DCT compression artifacts”, J. Morreale, ed., Society for Information Display International Symposium V, Digest of Technical Papers, vol. 25, pp. 708-711, 1994.
Zakhor, A., “Iterative Procedures for Reduction of Blocking Effects in Transform Image Coding”, Circuits and Systems for Video Technology, IEEE Transactions on, vol. 2, pp. 91-95, 1992.
Bovik, A., “Handbook of Image and Video Processing”, Academic Press, pp. 192-198 and 605-606, 2000.
Jain, A.K., “Fundamentals of Digital Image Processing”, Prentice-Hall, pp. 256, 1989.
Huang, S.J., “Adaptive Noise Reduction and Image Sharpening for Digital Video Compression”, Systems, Man, and Cybernetics, 1997. ‘Computational Cybernetics and Simulation’., 1997 IEEE International Conference on, vol. 4, pp. 3142-3147, 1997.
Bouzerdoum, A., “A Combined Quadratic Optimization/Median Filtering Technique for Image Restoration”, Systems, Man, and Cybernetics, 1998. 1998 IEEE International Conference on, vol. 5, pp. 4447-4452, 1998.
Kim, T.K., Paik, J.K., “Blocking Artifacts Reduction Based on Regularize Iterative Image Restoration”, Proceedings of ITC-CSCC '98, Jul. 13-15, Sokcho, Korea, pp. 55-58, 1998.
Coifman, Ronald R. and Artur Sowa. “New Methods of Controlled Total Variation Reduction for Digital Functions.”Society for Industrial and Applied Mathematics. vol. 39, No. 2, pp. 480-498, 2001.
Frieden, B.R. “A New Restoring Algorithm for the Preferential Enhancement of Edge Gradients.”The Optical Society of America. vol. 66, No. 3, pp. 280-283, Mar. 1976.
Sowa, Artur. “Novel Types of Nondiffusive Flows with Applications to Image Enhancement.” Jan. 2001.
Pegasus Imaging Corporation
Perungavoor Sath V.
Straub Michael P.
Straub & Pokotylo
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