Method and apparatus for transmitting facsimiles over telephone

Details Method and apparatus for transmitting facsimiles over telephone Method and apparatus for transmitting facsimiles over telephone

1977-05-16

1978-12-05

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358294, H04N 140

Patent

active

041288505

ABSTRACT:
The quality of and/or transmission speed for fingerprint facsimiles transmitted over telephone lines are improved by image enhancement prior to transmission. Image enhancement is achieved by using a multi-element photodetector array and simultaneously processing the signals from the component elements of the multi-element photodetector to produce a binary video output indicating whether the center of the scan is on a ridge or a valley portion of the fingerprint.

REFERENCES:
patent: 3775559 (1973-11-01), Vieri
patent: 3993888 (1976-11-01), Fellman

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