Log-scaling magnitude modulated watermarking scheme |
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作者单位: | LING HeFei(School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China) ;
YUAN WuGang(School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China) ;
ZOU FuHao (School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China) ;
LU ZhengDing(School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China) ; |
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基金项目: | 国家自然科学基金;湖北省自然科学基金 |
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摘 要: | A real-time watermarking scheme with high robustness and security has been proposed based on modulating the log-scaling magnitudes of DCT coefficients, which is most suitable for JPEG images and MPEG streams. The watermark bit is encoded as the sign of the difference between the individual log-scaling magnitude of a group-region and the average one of all group-regions. The log-scaling magnitude can be modulated by modifying the low and middle frequency DCT coefficients imperceptibly. The robustness of scheme is not only dependent on those largest coefficients, but also on the other coefficients with the same proportion. It can embed 512 bits into an image with a size of 512×512, which can satisfy the payload requirement of most video watermarking applications. Moreover, the watermark embedding process only requires one-sixth of the time consumed during normal playing of video, and the watermark detection only requires one-twelfth of that, which can meet the real-time requirements of most video watermarking applications. Furthermore, the experimental results show that the presented scheme is transparent and robust to significant valumetric distortions (including additive noise, low-pass filtering, lossy compression and valumetric scaling) and a part of geometric distortions. It performs much better than the EMW algorithm in resisting all kinds of distortions except Gaussian noise with a larger deviation.
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收稿时间: | 14 July 2006 |
修稿时间: | 26 February 2007 |
Log-scaling magnitude modulated watermarking scheme |
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Authors: | Ling HeFei Yuan WuGang Zou FuHao Lu ZhengDing |
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Affiliation: | School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract: | A real-time watermarking scheme with high robustness and security has been proposed based on modulating the log-scaling magnitudes
of DCT coefficients, which is most suitable for JPEG images and MPEG streams. The watermark bit is encoded as the sign of
the difference between the individual log-scaling magnitude of a group-region and the average one of all group-regions. The
log-scaling magnitude can be modulated by modifying the low and middle frequency DCT coefficients imperceptibly. The robustness
of scheme is not only dependent on those largest coefficients, but also on the other coefficients with the same proportion.
It can embed 512 bits into an image with a size of 512×512, which can satisfy the payload requirement of most video watermarking
applications. Moreover, the watermark embedding process only requires one-sixth of the time consumed during normal playing
of video, and the watermark detection only requires one-twelfth of that, which can meet the real-time requirements of most
video watermarking applications. Furthermore, the experimental results show that the presented scheme is transparent and robust
to significant valumetric distortions (including additive noise, low-pass filtering, lossy compression and valumetric scaling)
and a part of geometric distortions. It performs much better than the EMW algorithm in resisting all kinds of distortions
except Gaussian noise with a larger deviation.
Supported by the National Natural Science Foundation of China (Grant No. 60502024), and the Natural Science Foundation of
Hubei Province (Grant No. 2005ABA267) |
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Keywords: | watermarking magnitude modulated watermarking log-scaling Watson perceptual model |
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