Image analysis – Histogram processing – For setting a threshold
Patent
1992-02-26
1994-06-14
Mancuso, Joseph
Image analysis
Histogram processing
For setting a threshold
382 37, 358426, 358432, 348384, G06K 936, G06K 968, H04N 712
Patent
active
053217764
ABSTRACT:
A data processing system augments compression of non-zero values of significant coefficients by coding entries of a significance map independently of coding the values of significant non-zero coefficients. A dedicated symbol represents a zerotree structure encompassing a related association of insignificant coefficients within the tree structure. The zerotree symbol represents that a coefficient is a root of a zerotree if, at a threshold T, the coefficient and all of its descendants that have been found to be insignificant at larger thresholds have magnitudes less than threshold T. The zerotree structure is disclosed in the context of a pyramid-type image subband processor together with successive refinement quantization and entropy coding to facilitate data compression.
REFERENCES:
patent: 4447886 (1984-05-01), Meeker
patent: 4751742 (1988-06-01), Meeker
patent: 4816914 (1989-03-01), Ericsson
patent: 4944023 (1990-07-01), Imao et al.
patent: 5021891 (1991-06-01), Lee
patent: 5048111 (1991-09-01), Jones et al.
Visual Communications and Image Processing '90, Oct. 1990, Lausanne, Switz., pp. 1822-1933. L. Salgado et al., "Pyramidal Encoding for Packet Video Transmission" para. 5.1-para. 5.2.
Visual Communications and Image Processing IV (SPIE vol. 11199) 1989, pp. 10-15-1026. L. Wang and M. Goldberg, "Block Transform Image Coding by Multistage Vector Quantization with Optimal Bit Allocation", p. 1016, line 27-p. 1017, line 17.
Optical Engineering, vol. 26, No. 7, Jul. 1987, pp. 581-589. K. H. Tzou, "Progressive Image Transmission: A Review and Comparison of Techniques", para. 4.
IEEE Journal on Selected Areas on Communications, vol. SAC-2, No. 2, Mar. 1984, pp. 359-373. A. Sanz et al., "Approximation Quality Improvement Techniques in Progressive Image Transmission", p. 364, col. 1, line 17-p. 367, col. 2, line 10.
Visual Communications and Image Processing 90, Oct. 1990, Lausanne, Switz., pp. 924-935. S. H. Park and S. U. Lee, "The Coding Gains of Pyramid Structures in Progressive Image Transmission".
Lewis et al., "A 64 Kb/s Video Codec Using the 2-D Wavelet Transform", Proceedings of the DCC '90 Data Compression Conference, Apr. 8-11, 1991, IEEE Computer Society Press, Los Alamitos, CA, pp. 196-201.
Pentland et al., "A Practical Approach to Fractal-Based Image Compression", Proceedings of the DCC '91 Data Compression Conference, Apr. 8-11, 1991, IEEE Computer Society Press, Los Alamitos, CA., pp. 176-185.
Zettler et al., "Applications of Compactly Supported Wavelets to Image Compression", Proceedings of SPIE--The International Society for Optical Engineering, vol. 21, Feb. 13-15, 1990.
Ang et al., "Video Compression Makes Big Gains", IEEE Spectrum, Oct. 1991, pp. 16-19.
Burt et al., "The Lapacian Pyramid as a Compact Image Code", IEEE Transactions on Communications, vol. Com-31, No. 4, Apr. 1983, pp. 532-540.
Fox David
General Electric Company
Herrmann Eric P.
Kurdy Ronald H.
Mancuso Joseph
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