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Quality enhancement of printed-and-scanned images using distributed coding

机译:使用分布式编码提高打印和扫描图像的质量

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In this paper we address visual communications via print-and-scan channels from an information-theoretic point of view as communications with side information that targets quality enhancement of visual data at the output of this type of channels. The solution to this problem addresses important aspects of multimedia data processing and management. A practical approach to side information communications for printed documents based on Wyner-Ziv and Gray setups is analyzed in the paper that assumes two separated communications channels where an appropriate distributed coding should be elaborated. The printing channel is considered to be a direct visual channel for images ("analog" channel with degradations). The "digital channel" is considered to be an appropriate auxiliary channel exploited to communicate the information exploited for quality enhancement of printed-and-scanned image. We demonstrate both theoretically and practically how one can benefit from this sort of "distributed paper communications".
机译:在本文中,我们从信息论的角度着眼于通过打印和扫描通道进行的视觉通信,将其作为与附带信息的通信,其目标是在此类通道的输出端提高视觉数据的质量。该问题的解决方案解决了多媒体数据处理和管理的重要方面。本文分析了一种基于Wyner-Ziv和Gray设置的用于印刷文档的边信息通信的实用方法,该方法假设两个独立的通信通道应详细说明适当的分布式编码。该打印通道被认为是图像的直接视觉通道(具有降级的“模拟”通道)。 “数字通道”被认为是一种适当的辅助通道,可用于传达所利用的信息以提高打印和扫描图像的质量。我们在理论上和实践上都演示了如何从这种“分布式纸质通讯”中受益。

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