Adaptive Print-Scan Resilient Image Watermarking Based on Fourier Transform
Received date: 2016-03-04
Revised date: 2016-04-04
Online published: 2016-05-30
廖挺, 李治江 . 基于傅里叶变换的自适应抗打印扫描水印算法[J]. 应用科学学报, 2016 , 34(3) : 309 -316 . DOI: 10.3969/j.issn.0255-8297.2016.03.008
A robust blind watermarking scheme that combines uniform log-polar mapping and perceptual band decomposition of Fourier domain is proposed, which can resist general print-scan attacks. The proposed scheme can guarantee invisibility and increase robustness of the watermark. Perceptual band decomposition that splits the Fourier domain into overlapping sub-bands is used to locate the mid-frequency domain. Uniform log-polar mapping is applied to mid-frequencies in the Fourier domain. Watermark embedding in the mid-frequencies is adaptively controlled by the local spectrum property. Finally, a spatial perceptual mask is used to compensate distortion after the embedded image is inversely transformed back to the spatial domain. Both the theoretical analysis and experimental results show that the proposed scheme is invisible, and robust against general print-scan attacks.
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