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1. 发明授权

US06172769B2 Printer dependent descreening method 失效
标题翻译：打印机依赖的去网方法
公开(公告)号：US06172769B2
公开(公告)日：2001-01-09
申请号：US09131041
申请日：1998-08-06
申请人： Ravishankar Rao , Gerhard Robert Thompson , Charles Philipe Tresser , Chai Wah Wu
发明人： Ravishankar Rao , Gerhard Robert Thompson , Charles Philipe Tresser , Chai Wah Wu
IPC分类号： H04N152
CPC分类号： H04N1/40075
摘要： A method and an apparatus to descreen a halftoned picture takes into account the actual distribution of black or colors on the print without the need for scanning printed images but, rather, using only the printing decision matrix and the printer characteristics. For the purpose of laser printing, or more generally for reproduction on any printing device with a limited number of printing levels, a color or grayscale image has to be transformed into an array of printing decisions at each pixel of the output image. Sometimes this array is the only available representation of the original image. One may desire to reconstitute a good approximation of the original grayscale image from this array, for instance to print the picture on a printer with different characteristics from the printer for which the array was originally prepared, or to display it on a high resolution monitor. The method and apparatus to solve this problem in a way which take precise account of printer characteristics is described.
摘要翻译：对半色调图像进行去屏的方法和装置考虑到打印件上的黑色或彩色的实际分布，而不需要扫描打印的图像，而是仅使用打印决定矩阵和打印机特性。为了激光打印的目的，或更通常地，在具有有限数量的打印级别的任何打印设备上进行再现，颜色或灰度图像必须在输出图像的每个像素处被转换为打印决定的阵列。有时这个数组是原始图像的唯一可用表示。可能希望从该阵列重构原始灰度图像的良好近似，例如在具有与原始准备阵列的打印机不同的特征的打印机上打印图像，或者将其显示在高分辨率监视器上。以描述打印机特性的精确方式来解决这个问题的方法和装置被描述。

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