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Minimizing Stochastic Moire Using Green-Noise Halftoning

机译:使用绿色噪声半色调最小化随机波纹

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In amplitude modulated halftoning, Moire refers to the low frequency textures created by superimposing the monochrome halftones of cyan, magenta, yellow, and black inks. Recently, a stochastic Moire phenomenon has been discovered that accounts for the low frequency graininess created by superimposing frequency modulated (FM) halftones. A particularly interesting property of stochastic Moire is that it is most visible when overlapping FM patterns are uncorrelated and are of equal intensity. So in a printer that cannot guarantee perfect alignment in the component screens, the only way to minimize the visibility of Moire is to introduce clustering such that two overlapping dither patterns of equal intensity have different principal frequencies. In this article, we introduce an adaptive error diffusion halftoning algorithm that produces green-noise dither patterns with coarseness varying according to color content.
机译:在调幅半色调中,摩尔纹是指通过叠加青色,品红色,黄色和黑色墨水的单色半色调而创建的低频纹理。最近,发现了一种随机的莫尔现象,该现象解释了由于叠加了调频(FM)半色调而产生的低频颗粒感。随机莫尔的一个特别有趣的特性是,当重叠的FM模式不相关且强度相等时,它最明显。因此,在不能保证在组件屏幕中完美对齐的打印机中,最小化Moire可见度的唯一方法是引入聚类,以使两个强度相同的重叠抖动模式具有不同的主频率。在本文中,我们介绍了一种自适应误差扩散半色调算法,该算法可产生绿色噪声抖动图案,其粗糙度根据颜色含量而变化。

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