MULTI-LEVEL SEMI-VECTOR ERROR DIFFUSION

A method and apparatus for multi-level color error diffusion employs semi- vector quantization. When operating on image data comprising three color separations, the method employs a vector quantization for the two separation s with the most visually perceptive color output to generate a multi-level...

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Bibliographische Detailangaben
Hauptverfasser:	SHIN, HELEN HAEKYUNG, FAN, ZHIGANG
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CALCULATING COMPUTING CORRECTION OF TYPOGRAPHICAL ERRORS COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME IMAGE DATA PROCESSING OR GENERATION, IN GENERAL LINING MACHINES PERFORMING OPERATIONS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method and apparatus for multi-level color error diffusion employs semi- vector quantization. When operating on image data comprising three color separations, the method employs a vector quantization for the two separation s with the most visually perceptive color output to generate a multi-level output pixel for each separation based on the sum and a difference of the input pix el values for the two separations. The method generates multilevel output pixel s for the third color separation using scalar error diffusion.