【作者】 茅耀斌； 戴跃伟； 王执铨； 孙金生；

【Author】 Mao Yaobin Dai Yuewei Wang Zhiquan Sun JinshengDepartment of Automation, Nanjing University of Science and Technology, Nanjing, 210094

【机构】 南京理工大学自动化系；

【摘要】 本文提出了一种用于图像认证的半易损水印方案。此方案采用基于图像内容的二值序列作为水印,并利用Baker映射将之置乱,尔后将置乱的水印嵌入到图像中去。解码时,通过比较直接解出的置乱水印和经Baker映射反变换后的解出水印,可以确定图像受到篡改的位置。实验表明,此水印算法对中等程度JPEG压缩以及图像平滑、加噪、直方图均匀化等操作具有较高的抵御能力。更多还原

【Abstract】 A semi-fragile watermarking scheme is proposed in this paper, which can be used in image authentication. In the scheme, a bipolar series is generated based on image content and is embedded into an image after being permuted via Baker mapping. By comparing permuted watermark extracted from pending authenticating image with its inverted Baker mapping copy, the image tamper can be localized. Experiment shows that the scheme can work well under moderate JPEG compression and some other image processing such as smoothing, noise addition and histogram equilibrium.更多还原