Method of perceptually modeling a video image signal

Details Method of perceptually modeling a video image signal Method of perceptually modeling a video image signal

1991-02-08

1992-05-12

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, 382 56, H04N 713

Patent

active

051132567

ABSTRACT:
A video image signal is transform coded to derive a plurality of blocks of transform coefficients, the coefficients of each block being separated into horizontal, vertical and diagonal spatially related regions. A plurality of values each representing the degree to which a portion of the video image is characterized by a respective image related perceptual characteristic are derived in responsee to the estimated energy in the three regions. The derived perceptual values are combined and weighted to provide a single output value corresponding to each coefficient block.

REFERENCES:
patent: 4774574 (1988-09-01), Daly et al.
patent: 4780761 (1988-10-01), Daly et al.
patent: 4802232 (1989-01-01), Altes
patent: 4959870 (1990-09-01), Tachikawa

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