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    • 71. 发明授权
    • Sub-dot phase modulation for computer to plate inkjet system
    • 计算机到平板喷墨系统的子点相位调制
    • US06962400B2
    • 2005-11-08
    • US10667261
    • 2003-09-17
    • Luc MinneboKoen Vande VeldePaul Delabastita
    • Luc MinneboKoen Vande VeldePaul Delabastita
    • B41J2/205B41J29/38B41N1/00G06K15/00H04N1/40H04N1/405
    • H04N1/4057H04N1/40087H04N1/4052
    • Printing masters are produced by use of an inkjet printing system.The smallest halftone dot size which can be printed by the inkjet printing system is larger than the size of a pixel of the recording grid defined by the addressability of the printing device.The error diffusion algorithm is especially adapted to make use of the high addressability of the recording system.Using a sub-dot phase modulated error diffusion halftoning algorithm allows for the distance between the halftone dots to be modulated in much smaller increments than the size of the halftone dots themselves.Results can be further improved by dynamically influencing the threshold value in the error diffusion algorithm in accordance with previous output quantisation determinations.Variable coverage percentage of the pixels can be taken into account.The method can be extended to multilevel systems.
    • 印刷大师通过使用喷墨打印系统生产。 可以由喷墨打印系统打印的最小的半色调点尺寸大于由打印设备的可寻址性定义的记录格栅的像素的尺寸。 误差扩散算法特别适用于利用记录系统的高可寻址性。 使用子点相位调制误差扩散半色调算法允许半色调点之间的距离以比半色调点本身的大小更小的增量进行调制。 通过根据先前的输出量化确定动态影响误差扩散算法中的阈值可以进一步改善结果。 可以考虑像素的可变覆盖率。 该方法可以扩展到多级系统。