专利名称：Color image processing method and system发明人：Shinji Kita,Hitoshi Ogatsu,Noriyuki
Kazama,Kazumasa Murai,Yuzuru Suzuki
申请号：US08/371982申请日：19950113公开号：US05729360A公开日：19980317
摘要：A color image processing system for generating recorder image signals of fourcolors containing India ink from three color signals, the color image processing systemincludes a converter for converting three color signals into separated brightness andchromaticity signals; a range converter for converting the brightness signal into a rangeconverted brightness signal which is within a record color reproduction range; an edgedetector for obtaining an edge amount signal from the range converted brightnesssignal; a chroma detector for detecting chroma of an image signal from the chromaticitysignal; an edge enhancer for enhancing an edge part of an image represented by therange converted brightness signal; a smoothing circuit for smoothing the rangeconverted brightness signal; a brightness and chromaticity converter which includes aconverter for executing brightness conversion by mixing an output of the edge enhancerand an output of the smoothing circuit according to the edge amount signal detected bythe edge detector and a converter for executing chromaticity conversion for providing achromaticity signal corresponding to compression/expansion of the chroma according toan output of the edge detector and an output of the chroma detector; and a recordcolor converter for generating recorder image signals of four colors containing India ink
according to an output of the brightness and chromaticity converter using a colorconversion table.
申请人：FUJI XEROX CO., LTD.
代理机构：Finnegan, Henderson, Farabow, Garrett & Dunner, LP.
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