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    • 1. 发明申请
    • COLOR PRINTING
    • 彩色打印
    • US20100214341A1
    • 2010-08-26
    • US12390583
    • 2009-02-23
    • XING LIFrancis K. TseZhenhuan WenDavid Metcalfe
    • XING LIFrancis K. TseZhenhuan WenDavid Metcalfe
    • B41J2/205
    • H04N1/6022H04N1/52
    • A method of printing comprising setting a pixel black value of K for an ink limit and identifying each of black dots of a first subset of black dots having pixel black value K greater than the ink limit, and pixel color value of cyan, magenta, and yellow equal to zero. The method further comprises rendering only K for a pixel value for the first subset of black dots and replacing each of black dots of a second subset of black dots of a halftoned bit map for a predetermined area with a process black dot. The method still further comprises adding a non-black dot to each of black dots of a third subset of black dots of the bit-mapped data, wherein the halftoned bit map is generated by halftoning continuous tone data; wherein the black dots of the third subset comprises a percentage of all the black dots that tends to generally increase as a ratio of black coverage to total coverage in the predetermined area increases; wherein the first, second, and third subset comprises black dots that are mutually exclusive; and, printing the bit map.
    • 一种打印方法,包括:将墨水极限的像素黑值设置为K,并且识别具有大于墨水限制的像素黑值K的黑点的第一子集的黑点,以及青色,品红色和 黄色等于零。 该方法还包括仅为黑色点的第一子集渲染像素值的K,并用处理黑点代替预定区域的半色调位图的第二子黑点的每个黑点。 该方法还包括向比特映射数据的黑点的第三子集中的每个黑点添加非黑点,其中通过对连续色调数据进行半色调生成半色调比特图; 其中所述第三子集的黑点包括随着所述预定区域中的黑色覆盖率与总覆盖率的比率增加而趋于一般增加的所有黑点的百分比; 其中所述第一,第二和第三子集包括相互排斥的黑点; 并打印位图。