Enhancement of compressed images

Details Enhancement of compressed images Enhancement of compressed images

2011-06-07

2011-06-07

Tucker, Wesley (Department: 2624)

Image analysis

Image compression or coding

C382S275000, C382S100000

Reexamination Certificate

active

07957599

ABSTRACT:
A method and apparatus for enhancing compressed images is described. In one embodiment, the method comprises characterizing quantization noise in reconstructed low pass coefficients generated in response to application of an inverse wavelet transform and removing the quantization noise from the reconstructed low pass coefficients constructed during decoding.

REFERENCES:
patent: 5412741 (1995-05-01), Shapiro
patent: 5420636 (1995-05-01), Kojima
patent: 5497777 (1996-03-01), Abdel-Malek et al.
patent: 5568142 (1996-10-01), Velazquez et al.
patent: 5610729 (1997-03-01), Nakajima
patent: 5974181 (1999-10-01), Prieto
patent: 6128346 (2000-10-01), Suarez et al.
patent: 6211515 (2001-04-01), Chen et al.
patent: 6985632 (2006-01-01), Sato et al.
patent: H9-172639 (1997-06-01), None
patent: 10-023411 (1998-01-01), None
patent: H10-507891 (1998-07-01), None
patent: 2000-134625 (2000-05-01), None
patent: 2001-136526 (2001-05-01), None
Neelamani, R., et al. “Wavelet-Based Deconvolution for III-Conditioned Systems,” Acoustics, Speech and Signal Processing, 1999. Proceedings 1999 IEEE International Conf. on Phoenix, AZ., USA, Mar. 15-19, 1999, Piscataway, NJ., pp. 3241-3244.
Santa Cruz, Diego, et al., “The JPEG 2000 Image Coding Standard A Powerful Algorithm and Data Format,” Dr. Dobb's Journal, M&T Publ., Redwood City, CA., vol. 26, No. 4, Apr. 2001, pp. 46-54.
Shen, Mei-Yen, et al., “Review of Postprocessing Techniques for Compression Artificat Removal,” Journal of Visual Communication and Image Representation, Academic Press, Inc. vol. 9, No. 1, Mar. 1998, pp. 2-14.
Xiong, Ziziang, et al., “A Simple Deblocking Algorithm for JPEG Compressed Images Using Overcomplete Wavelet Representations,” Circuits and Systems, Proceedings of 1997 IEEE International Symposium on Hong Kong Jun. 9-12, 1997, NY, NY, pp. 1077-1080.
Choi, Hyuk, et al., “Blocking-Artifact Reduction in Block-Coded Images Using Wavelet-Based Subband Decomposition,” IEEE Transactions on Circuits and Systems for Video Technology, IEEE Inc., NY, vol. 10, No. 5, Aug. 2000, pp. 801-805.
Japanese Office Action dated Feb. 17, 2009; JP Patent Application No. 2006-322565, 2 pgs.

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