公开(公告)号：US20080062480A1

公开(公告)日：2008-03-13

申请号：US11899470

申请日：2007-09-06

申请人： Shinichi IIZUKA ,  Toshitsugu YAMAMOTO

发明人： Shinichi IIZUKA ,  Toshitsugu YAMAMOTO

IPC分类号： G03F3/00

CPC分类号： H04N1/642 ,  H04N1/644

摘要： A printer divides an input image into a plurality of blocks and extracts a block image corresponding to each of the blocks. The colors of the block image are reduced to, for example, four colors. Index numbers are given to pixels of the color-reduced image, and the four colors are assigned. To a color palette in which color information of the four colors is described in correspondence with the index numbers, object information indicative of the kinds of images (for example, a character, a chart, and a photographic image) is added. Consequently, the handling performance of object information for use in an image processing such as a color conversion process is improved.

摘要翻译： 打印机将输入图像划分为多个块，并提取与每个块对应的块图像。 块图像的颜色被减少为例如四种颜色。 索引号被赋予减色图像的像素，并且分配四种颜色。 对于与索引号相对应地描述了四种颜色的颜色信息的调色板，添加了指示图像种类（例如，字符，图表和摄影图像）的对象信息。 因此，提高了用于诸如颜色转换处理的图像处理中的对象信息的处理性能。