High speed system for image scaling

专利名称：High speed system for image scaling发明人：Fujii, David B.,Rust, Robert A.,Hershberger,

David

申请号：EP96113191.9申请日：19960816公开号：EP0794510A3公开日：19990203

专利附图：

摘要：A system converts a source image (10), which may include plural grey levelsource pixels at a first resolution level, to a destination image (18) at a second resolutionlevel. The system employs a scaling subsystem including a memory (86) which stores at

least a portion of a row of source pixels, a scale factor and a relative input index array(RIIA) (92) comprising a single index bit for each column of the destination image (18).Each index bit enables a grey level source pixel to be identified to be used in scaling ofthe source image (10) to the second resolution. A scale logic circuit (200, 212, 208) isresponsive to each index bit and the source pixels, to associate at least one source pixelwith each column of the destination image (18). The scaling subsystem further includes acontrol processor (100) which calculates the RIIA (92) based upon the scale factor storedin the memory (86).

申请人：Hewlett-Packard Company

地址：3000 Hanover Street Palo Alto, California 94304 US

国籍：US

代理机构：Schoppe, Fritz, Dipl.-Ing.

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