Image analysis – Histogram processing – For setting a threshold
Patent
1990-08-09
1992-07-28
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
382 17, 382 54, 358 80, G06K 948
Patent
active
051346672
ABSTRACT:
An area discriminating system for use in an image processing system capable of processing an image signal including character images signals and halftone images signals which determines the hues of the images represented by the image signal, produces hue present signals for each color of a selected number of colors which is a component of the hues of the images and a hue absent signals for each color of the selected number of colors which is not a component of the hues of the images, detects edge portions of images represented by the image signal, produces edge signals having values representing the edge portions, and produces edge emphasized signals for each hue included in the portion of the image represented by the edge signals. The image processing system further determines whether the image represented by the image signal is a halftone image or a character image and produces the edge emphasized signals further in accordance with the image determination.
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patent: 4577235 (1986-03-01), Kannapell et al.
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patent: 4700399 (1987-10-01), Yoshida
patent: 4707745 (1987-11-01), Sakano
patent: 4982277 (1991-01-01), Katoh et al.
Couso Jose L.
Fuji 'Xerox Co., Ltd.
Moore David K.
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