Dynamic video system and method

Details Dynamic video system and method Dynamic video system and method

1982-12-23

1987-09-01

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 358284, 382 53, H04N 1040

Patent

active

046912398

ABSTRACT:
The processing of video signal information derived from scanning the characters or marks on a background sheet includes normalizing the signal levels against changes in operating conditions and dynamically altering the threshold level of the video signal in response to the changes in levels of video signal.

REFERENCES:
patent: 3869698 (1975-03-01), Trost et al.
patent: 3909594 (1975-09-01), Allais et al.
patent: 4276568 (1981-06-01), Wischer
patent: 4345314 (1982-08-01), Melamud et al.
patent: 4442544 (1984-04-01), Moreland et al.
patent: 4446486 (1984-05-01), Itoh
R. E. Penny "Dynamic Threshold Setting Circuit", vol. 18, No. 6, Nov. 1975, pp. 1962-1965, IBM Tech. Discl. Bulletin.
H. Klepp "Dynamic Video Thresholding", vol. 22, No. 3, Aug. 1979, pp. 1031-1033 IBM Tech. Discl. Bulletin.

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