Method and apparatus for coding image information, and method of

Details Method and apparatus for coding image information, and method of Method and apparatus for coding image information, and method of

1994-05-02

2000-06-06

Chang, Jon

Image analysis

Image compression or coding

Quantization

348422, G06K 938, G06T 900

Patent

active

060729104

ABSTRACT:
A coding apparatus divides digital image information into pixel blocks each having a size of m.times.n pixels, and subjects the image information to vector quantization in block units. The pixel blocks are orthogonally transformed and the characteristics and sequency components of the pixel blocks are detected. Each pixel block is divided into a plurality of sub-blocks in conformity with the detected sequency components. Respective ones of the plurality of divided and outputted sub-blocks are scalar-quantized into sub-vectors of a predetermined number of bits in conformity with the characteristics of the pixel blocks. Respective ones of the scalar-quantized values of the quantized sub-blocks are vector-quantized in conformity with the characteristics of the pixel blocks, these vector-quantized reproduction vector codes are combined and the result is subjected to further vector quantization.

REFERENCES:
patent: 4670851 (1987-06-01), Murakami et al.
patent: 4691329 (1987-09-01), Juri et al.
patent: 4853779 (1989-08-01), Hammer et al.
patent: 4862262 (1989-08-01), Tanaka
patent: 4943855 (1990-07-01), Bheda et al.
patent: 4974071 (1990-11-01), Maeda
patent: 5010401 (1991-04-01), Murakami et al.
patent: 5162923 (1992-11-01), Yoshida et al.
patent: 5194950 (1993-03-01), Murakami et al.
patent: 5359438 (1994-10-01), Maeda
Tocci et al. Microprocessors and Microcomputers:Hardware and Software. Prentice-Hall, New Jersey, pp. 59-60, 1987.

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