Image coding system using an orthogonal transform and bit alloca

Details Image coding system using an orthogonal transform and bit alloca Image coding system using an orthogonal transform and bit alloca

1992-01-16

1994-07-05

Couso, Jon J.

Image analysis

Histogram processing

For setting a threshold

382 41, 358433, G06K 936

Patent

active

053275020

ABSTRACT:
A bit allocation method which facilitate control of the number of bits to be assigned to transform coefficients and block of image data with a deviation from the functional form. An image coding system which can implement an optimal bit allocation that minimizes quantization error under a predetermined information content or amount, in carrying out bit allocations of block-adaptive type and transform coefficient-adaptive type.

REFERENCES:
patent: 4184049 (1980-01-01), Crochiere et al.
patent: 4516258 (1985-05-01), Ching et al.
patent: 5021891 (1991-06-01), Lee
patent: 5109451 (1992-04-01), Aono et al.
Communication from the European Patent Office dated Jun. 21, 1993.
H. Hashimoto "Image Data Coding Algorithm II--Transform Coding--", Journal of the Institute of Television Engineers of Japan, vol. 43, No. 10, 1989.
W. Chen, C. Harrison Smith, "Adaptive Coding of Monochrone and Color Images", IEEE Transaction on Communications vol. Com. 25, No. 11 Nov. 1977.
A. Rosenfeld and A. C. Kak: "Digital Picture Processing", Academic Press Inc., 2nd Edition, 1989, pp. 116-165.

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