Method of compressing image signals

Details Method of compressing image signals Method of compressing image signals

1987-04-20

1988-10-04

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358136, G06K 900, H04N 712

Patent

active

047760290

ABSTRACT:
A method of compressing image signals comprises the step of dividing the image signals into main signals sampled at appropriate intervals and interpolation signals other than the main signals. As for said main signals, prediction encoding compression processing is carried out between the main signals. As for the interpolation signals, prediction encoding compression processing is carried out based on the main signals. At least for the interpolation signals, quantization processing for making the bit resolution coarse is carried out in the course of encoding. The quantization processing of the interpolation signals is carried out for making the bit resolution coarser than the bit resolution of the main signals.

REFERENCES:
patent: 4125861 (1978-11-01), Mounts et al.
patent: 4268861 (1981-05-01), Schreiber et al.
patent: 4353096 (1982-10-01), Sakurai
patent: 4460923 (1984-07-01), Hirano et al.
patent: 4675733 (1987-06-01), Tanimoto
patent: 4683494 (1987-07-01), Furukawa et al.

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