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Alternative TitleCharacteristics of Color Images with Watermark Based on the Relationship Between Non-Void Subspaces of Inner Space
马玲; 张晓辉
Source Publication计算机学报
Keyword水印 特征分析 彩色图像 变换域 抗打印扫描
Other AbstractThe relationship between the transforms of the signal in different non-void subspaces of inner product space is established,the property of which is analyzed,based on which the connection between the Fourier transform and wavelet transform of the same signal is obtained. Embedding additive watermark in one transform domain can change the coefficients' value in another one,such as an additive watermark in the wavelet coefficients of images can change the frequencies' amplitude of the Fourier transform domain. The changed value is the convolution of watermark and the Fourier transform coefficients of the wavelet function. Accordingly,the characteristics of color images with multi-bits additive watermark in the wavelet domain are analyzed. There are stable and robust feature points in the logarithm domain of spectra's amplitude, positions of which are independent of wavelet basis,resistant to compression,Gaussian noise, pepper and salt noise,filtering and print-scanning attack,insensitive of scanning resolution as well. The feature points are used to detect watermark in color images,depending on which the watermark's sensitivity of geometric distortion can be solved. The change of the feature points' distribution caused by interpolation operation is also analyzed. Furthermore,the blind extraction algorithm is proposed. Watermark embedded in Haar wavelet diagonal coefficients of the color image undergone print-scan attack is extracted by Bior3.7 wavelet decomposition,the coefficients of which are processed as an image. The experimental results show that the blind and robust detection and extraction can be achieved without watermark and original images.
Indexed ByEI ; CSCD
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Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
马玲,张晓辉. 基于内积空间非空子空间变换关系的含水印彩色图像特征分析[J]. 计算机学报,2017,40(5):1203-1217.
APA 马玲,&张晓辉.(2017).基于内积空间非空子空间变换关系的含水印彩色图像特征分析.计算机学报,40(5),1203-1217.
MLA 马玲,et al."基于内积空间非空子空间变换关系的含水印彩色图像特征分析".计算机学报 40.5(2017):1203-1217.
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