Banding effect removal for digital multitoning

Jing-Ming Guo, Jia-Yu Chang, Yun-Fu Liu
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引用次数: 1

Abstract

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 three tone levels for improving the similarity between an original image and the converted image. Yet, the banding effect, indicating the areas with only one tone level, disturbs the visual perception, and thus seriously degrades image quality. To cope with the banding effect, the tone replacement strategy is proposed in this study. 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.
去除数字多频带效应
误差扩散是一种有效的半色调方法,主要应用于打印机。它具有很高的图像质量和处理效率,在半色调和多色调应用中具有广泛的应用前景和竞争力。多色调是半色调的扩展,采用三个以上的色调级别来提高原始图像和转换图像之间的相似性。然而,条带效应表示只有一个色调级别的区域,会干扰视觉感知,从而严重降低图像质量。为了应对带状效应,本研究提出了音调替换策略。实验结果表明,该方法可以同时提供与原始图像相同的良好色调相似度和有希望的重建点分布。与以前的无带方法相比,明显的改进/特征表明,该方法可以成为多频应用的一个非常有竞争力的候选方法。
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