摘要
提出一种用于版权保护的混合域数字图像水印算法。该算法具有以下特点:①根据宿主图像自身局部特性,实现基于图像内容的自适应块分割;②充分利用人眼视觉感知特性,实现嵌入位置的自适应确定及水印信息的自适应嵌入;③数字水印的提取不需要原始载体图像。实验结果表明该混合域自适应图像水印算法不仅具有较好的透明性,而且对诸如叠加噪声、JPEG压缩、平滑滤波、几何剪切、图像增强、马赛克效果等攻击均具有较好的鲁棒性。
An adaptive watermarking scheme for texture image in DCT and DWT domain is proposed. First, the host image is divided into blocks by local properties to increase the perceptual invisibility. Second, the significant blocks are selected in the divided blocks, DWT and DCT are performed, and the significant coefficients are determined by human visual system （HVS）. Finally, the binary watermark sequence is embedded adaptively by modifying the significant DWT/DCT coefficients according to inter-block correlation of coefficients. The algorithm can extract the watermark without the help from the original image. The experimental results prove that the proposed scheme is invisible and has a good robustness against several image processing such as cropping, compression, filtering, noise adding, image enhancement, and mosaic.
出处
《测绘学报》
EI
CSCD
北大核心
2006年第3期240-244,250,共6页
Acta Geodaetica et Cartographica Sinica
基金
辽宁省自然科学基金项目(20032100)
