Methods of discriminating and copying an image

Details Methods of discriminating and copying an image Methods of discriminating and copying an image

1987-02-03

1988-03-22

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, H04N 123

Patent

active

047333065

ABSTRACT:
A method of discriminating an image by scanning an original image with a photoelectric conversion device, quantizing an image signal obtained through the photoelectric conversion device, preparing a density histogram corresponding to the quantized image signal, detecting a peak density value corresponding to the peak present on the low-density side of the density histogram and a density width of the density histogram, and discriminating the original image according to both the peak density value and the density width.

REFERENCES:
patent: 4556916 (1985-12-01), Matsunawa
patent: 4578712 (1986-03-01), Matsunawa

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