IEEE Trans Image Process. 2015 Nov;24(11):4312-21. doi: 10.1109/TIP.2015.2460451. Epub 2015 Jul 23.
Error diffusion is an efficient halftone method for mainly being applied on printers. The promising high image quality and processing efficiency endorse it as a popular and competitive candidate in halftoning and multitoning applications. The multitoning is an extension of halftoning, adopting more than two-tone levels for the improvement of the similarity between an original image and the converted image. Yet, the banding effect, indicating the areas with discontinuous tone level, disturbs the visual perception, and thus seriously degrades image quality. To solve the banding effect, the tone-replacement strategy is proposed in this paper. As documented in the experimental results, excellent tone-similarity as that of the original image and promising reconstructed dot-distribution can be provided simultaneously. Comparing with the former banding-free methods, the apparent improvements/features suggest that the proposed method can be a very competitive candidate for multitoning applications.
误差扩散是一种高效的半色调方法，主要应用于打印机。其出色的图像质量和处理效率使其成为半色调和多色调应用中的热门和有竞争力的候选者。多色调是半色调的扩展，采用超过两种色调级来提高原始图像和转换图像之间的相似性。然而，带纹效应，即表示不连续色调级别的区域，会干扰视觉感知，从而严重降低图像质量。为了解决带纹效应，本文提出了色调替换策略。如实验结果所示，同时可以提供与原始图像出色的色调相似性和有希望的重建点分布。与以前的无带纹方法相比，明显的改进/特点表明，该方法可以成为多色调应用的极具竞争力的候选者。
