Picture signal binarization apparatus avoiding a need for memory

Details Picture signal binarization apparatus avoiding a need for memory Picture signal binarization apparatus avoiding a need for memory

1991-08-26

1993-10-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358457, 358465, 358466, H04N 140

Patent

active

052530809

ABSTRACT:
A picture signal binarization apparatus includes two comparators for converting an analog signal into a binary signal by comparing the analog signal with two different thresholds, two counters for counting inversions of the binary signal from each comparator and supplying a count signal indicative of the number of inversions of the binary signal from each of the comparators, and a selection part for selecting a binary signal from one of the comparators in response to the count signal supplied from one of the counters so that the selected binary signal is outputted as a subsequent output binary signal, the number of inversions indicated by the count signal from the one of the counters first reaching a predetermined value.

REFERENCES:
patent: 4578715 (1986-04-01), Yamaguchi
patent: 4903143 (1990-02-01), Sakamoto
patent: 4942478 (1990-07-01), Yagamishi et al.
patent: 5148495 (1992-09-01), Imao et al.

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