Image analysis – Image compression or coding – Quantization
Patent
1995-05-17
1998-03-10
Boudreau, Leo
Image analysis
Image compression or coding
Quantization
382235, G06K 900
Patent
active
057270929
ABSTRACT:
A method of embedding auxiliary information into the digital representation of host data created by a lossy compression technique. The method applies to data compressed with lossy algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as integer indices having redundancy and uncertainty in value by one unit. Indices which are adjacent in value are manipulated to encode auxiliary data. By a substantially reverse process, the embedded auxiliary data can be retrieved easily by an authorized user. Lossy compression methods use loss-less compressions known also as entropy coding, to reduce to the final size the intermediate representation as indices. The efficiency of the compression entropy coding, known also as entropy coding is increased by manipulating the indices at the intermediate stage in the manner taught by the method.
REFERENCES:
patent: 4216500 (1980-08-01), St. Louis
patent: 4700294 (1987-10-01), Haynes
patent: 4780718 (1988-10-01), Hudson et al.
patent: 4949381 (1990-08-01), Pastor
patent: 5065446 (1991-11-01), Suzuki et al.
patent: 5070402 (1991-12-01), Ishii et al.
patent: 5187755 (1993-02-01), Aragaki
Bradley Jonathan N.
Handel Theodore G.
Sandford, II Maxwell T.
Boudreau Leo
Tadayon Bijan
The Regents of the University of California
Wyrick Milton D.
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