Apparatus and method for encoding halftone and line copy data

Details Apparatus and method for encoding halftone and line copy data Apparatus and method for encoding halftone and line copy data

1977-04-04

1979-03-13

Murray, Richard

Facsimile and static presentation processing

Facsimile

Recording apparatus

358133, H04N 100

Patent

active

041445473

ABSTRACT:
A system for encoding halftone and line copy data having an unknown screen frequency and/or angle is disclosed. The data, in binary pixel form, is inputted to multiple predictors, each adapted to handle different types of imagery. The predictions made are compared with the established values for the pixels predicted and error signals generated. The error signals so produced are compared and the error signal with the least error is chosen for encoding.

REFERENCES:
patent: 2921124 (1960-01-01), Graham
patent: 4005411 (1977-01-01), Morrin
patent: 4070694 (1978-01-01), Sakamoto et al.

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