Picture image discriminating apparatus

Details Picture image discriminating apparatus Picture image discriminating apparatus

1982-12-13

1986-03-25

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 382 51, H04N 140

Patent

active

045787123

ABSTRACT:
A picture image discriminating apparatus operating for picture image discrimination processing by scanning a document, converting a light signal corresponding to every unit reading sizes 0.01 mm.sup.2 or over of the document photoelectrically and transmitting it to a signal processing division that a density signal of the picture image of document. The document is divided into a plurality of blocks, and the density signal of the picture image of document is processed at every blocks, thereby discriminating picture images. The density signal of the picture image of document is processed to obtain an effective density histogram, and a cumulative value of the density signals over or below a specific density threshold is obtained in the histogram, thereby discriminating picture images.

REFERENCES:
patent: 3965290 (1976-06-01), Tisue
patent: 4189744 (1980-02-01), Stern
patent: 4196454 (1980-04-01), Warren
patent: 4447830 (1984-05-01), Stoffel
patent: 4468703 (1984-08-01), Fujiwara et al.

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