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    • 6. 发明授权
    • Image processing apparatus and method and computer program product
    • 图像处理装置及方法及计算机程序产品
    • US06995862B1
    • 2006-02-07
    • US09443115
    • 1999-11-18
    • Masahiko MurataTomoo Iizumi
    • Masahiko MurataTomoo Iizumi
    • G06F15/00
    • H04N1/6022H04N1/46
    • If Y, M, C, and K color component images are serially generated by one color component image generating device in four steps, it takes much time to perform image processing for printing a one-page full-color image. This makes it impossible to increase the printing speed. In addition, since conversion to Y, M, C, and K data is performed before rendering, rendering logic cannot be faithfully implemented, resulting in poor color reproducibility. In order to solve these problems, image generating devices (103–105) respectively render R, G, and B color component images in bitmap memories 106 to 108, which are divided into areas in units of predetermined bands obtained by dividing a page, on the basis of a display list which is common to R, G, and B data and stored in a memory (102). The rendered color component images on a band basis are converted into C, M, Y, and K color component images by a color space converter (109) in synchronism with the operation of a printer engine.
    • 如果通过四个步骤由一个颜色分量图像生成装置串行地生成Y,M,C和K颜色分量图像,则执行用于打印单页全色图像的图像处理花费大量时间。 这使得不可能提高打印速度。 此外,由于在渲染之前进行到Y,M,C和K数据的转换,不能忠实地执行渲染逻辑,导致差的颜色再现性。 为了解决这些问题,图像产生装置(103-105)分别将位图存储器106至108中的R,G和B颜色分量图像分割成分割为通过划分页面而获得的预定频带的单位的区域 R,G和B数据共同的并存储在存储器(102)中的显示列表的基础。 与打印机引擎的操作同步地,通过颜色空间转换器(109)将基于频带的渲染的颜色分量图像转换成C,M,Y和K颜色分量图像。