Process for improving image quality in picture telegraphy

Details Process for improving image quality in picture telegraphy Process for improving image quality in picture telegraphy

1978-05-04

1980-07-15

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358284, H04N 136

Patent

active

042131553

ABSTRACT:
Apparatus and method for improving the picture quality during transmission of facsimile signals which have an image signal having a signal of a particular polarity but has an minimum amplitude to represent a first information state such as white and a maximum amplitude to represent a second information state such as black whereby due to changes of information of the signal inverter pulses are obtained for the formation of a signal of changed polarity such that the change in polarity represents an information state and the zero position represents the second information state.

REFERENCES:
patent: 3303284 (1967-02-01), Lender
patent: 3495032 (1970-02-01), Smith

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