【作者】 王婷； 王希常； 刘江；

【Author】 WANG Ting WANG Xichang LIU Jiang (School of information Science & Engineering,Shandong Normal University,Jina 250014,China,

【机构】 山东师范大学信息科学与工程学院；

【摘要】 本文提出了在文档图像中使用可见水印和自嵌入不可见水印组成的双水印系统来保护图像内容的水印加密算法。该算法利用图像的纹理特性将原始图像分块,并根据不同的嵌入强度将可见水印图像嵌入原始图像的频域中以显示文档图像的所有权,然后利用校验和生成自嵌入不可见水印,加入图像的空域中对图像进行认证。实验表明,嵌入可见水印和不可见水印的双水印系统能够达到既标识又认证图像的所有权的目的,并且能够精确定位篡改位置。更多还原

【Abstract】 This paper presents a dual watermarking algorithm for protection of publicly document images.The original image is first segmented into blocks based on the texture property,and different embedding intensities are used when embed the watermarking into the DCT domain of the original image to indicate ownership of the document image,then create self-embedded invisible watermarking using checksum,embed into the space domain to verify ownership of the image.The experiment shows that with the proposed dual watermarking system,we can achieve the goal of both indicating and verifying ownership,and it also can accurately detect the tamper location.更多还原