Image analysis – Histogram processing – For setting a threshold
Patent
1992-08-07
1993-04-13
Couso, Jose L.
Image analysis
Histogram processing
For setting a threshold
382 17, 358 75, 358 80, G06K 940
Patent
active
052029352
ABSTRACT:
A color conversion apparatus is described whereby color within at least one specific region of a color picture can be converted to a different color in a reproduced picture, while enabling gradations of color and lightness within that region to be left substantially unchanged. The conversion is based upon setting of pre-calculated output values in a table memory within a color conversion section, by an initialization operation, and conversion can be a change in one color attribute or in a combination of attributes of respective color values within the selected region. The table memory subsequently responds to successive input color values supplied thereto by producing color-converted output values which can be supplied for example to a color printer apparatus, with resultant degrees of color change being determined in accordance with degrees of closeness of one attribute or a combination of attributes of each input color value to the corresponding attribute or combination of attributes of a predetermined color value.
REFERENCES:
patent: 5034806 (1991-07-01), Ikeda et al.
patent: 5105466 (1992-04-01), Tsujiuchi et al.
patent: 5105469 (1992-04-01), MacDonald et al.
Fumoto Teruo
Kanamori Katsuhiro
Kotera Hiroaki
Couso Jose L.
Matsushita Electric - Industrial Co., Ltd.
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