Optical scanning system

Details Optical scanning system Optical scanning system

1981-04-27

1983-08-16

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358166, H04M 100

Patent

active

043994709

ABSTRACT:
A system for scanning recorded information processes a video output of the scanner in a manner providing a digital representation of dark and light portions of the information scanned. A reference voltage derived from each pulse or slope of the video output provides a reference against which the original pulse or slope can be compared to indicate transition of the slope across the reference voltage to generate a digital output representative thereof.

REFERENCES:
patent: 4315285 (1982-02-01), Sommer et al.
Y. M. Ting and W. Wilson, Fingerprint Image Enhancement System, I.B.M. Technical Disclosure Bulletin, No. 8, vol. 16, Jan. 1974.

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