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面向保真印刷的CMYK图像鲁棒水印方法
Robust Watermarking Applying to CMYK Printed Image for Fidelity Printing

DOI: 10.3969/j.issn.1001-0548.2017.03.009

Keywords: CMYK颜色空间,数字水印,保真印刷,视觉蒙版,印刷图像

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Abstract:

CMYK印刷图像数字水印所面临的主要挑战是抵抗印刷扫描过程的鲁棒性和水印对印刷图像颜色保真度的影响。该文基于CMYK颜色空间的再现特征和人眼视觉特点,提出在图像的Y色信息通道和K色信息通道中分别嵌入有意义水印和结构模板信号。为了提高印刷图像的颜色保真度,基于人眼视觉特征建立了视觉蒙版,并在图像的空间域中对水印信号进行重塑,以胶版印刷为工业应用背景进行了一系列实验测试。实验结果表明本文提出的面向保真印刷的CMYK图像鲁棒水印方法,适用于以胶版印刷方式为应用背景的CMYK图像保真复制,在实际应用中具有较好的有效性。

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