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Halftoning method using dispersed CMY dithering and blue noise mask

机译:使用分散的CMY抖动和蓝噪声蒙版的半色调方法

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摘要

This article proposes a halftoning method using dispersed CMY dithering with blue noise masks (BNM) to print CMY dots instead of black (K) dots in a bright gray region in a black-and-white (B/W) image. To reduce high granularity in a bright region, dispersed CMY dots using a BNM instead of K dots are spatially assigned to a bright region. First, a threshold is determined to avoid the granularity caused by K dots. Below this threshold, the image made by the BNM is composed of CMYK dots, whereas above the threshold, a dispersed CMY image is made from mutually exclusive C, M, and Y patterns, defined by the stacking constraint of the BNM. To make mutually exclusive C, M, and Y patterns, modified jointly-blue noise masks (MJBNMs) are generated for a grayscale image. As a result of processing a grayscale image, the low-pass filtered error for single and triple patterns where the three mask patterns overlap is minimized. As such, single and triple patterns are used. Experiments demonstrated that the bright regions produced by the proposed method were uniform and sufficiently pleasing when compared to conventional results.
机译:本文提出了一种半色调方法,该方法使用带有蓝色噪声蒙版(BNM)的分散CMY抖动来在黑白(B / W)图像的亮灰色区域中打印CMY点而不是黑色(K)点。为了减少明亮区域中的高粒度,将使用BNM而不是K点的分散CMY点在空间上分配给明亮区域。首先,确定阈值以避免由K个点引起的粒度。在此阈值以下,BNM生成的图像由CMYK点组成,而在阈值以上,则由BNM的堆叠约束定义的互斥C,M和Y模式制作分散的CMY图像。为了制作互斥的C,M和Y模式,会为灰度图像生成经过修改的联合蓝色噪声掩膜(MJBNM)。作为处理灰度图像的结果,三个掩模图案重叠的单个和三个图案的低通滤波误差被最小化。这样,使用单和三模式。实验证明,与常规结果相比,通过所提出的方法产生的明亮区域是均匀的并且足够令人愉悦。

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