摘要
针对旋转攻击与尺度变化攻击,提出一种基于尺度不变特征变换(SIFT)的可自适应还原尺度变化的抗旋转水印。首先,将水印图像进行离散余弦变换(DCT),与参考光生成全息水印图像;然后通过DCT嵌入载体图像Y通道;最后在提取水印时,通过SIFT自适应还原尺度变化,结构相似性指数(SSIM)校正旋转角度后提取水印信息。实验表明,本算法在有效抵抗常见攻击的同时,有较强的水印数据信息保真能力,且在同样的旋转校正精度时,有高效的运算效率,解决了现阶段抗旋转攻击水印技术只适用于相同尺度下的角度矫正问题。水印提取时需要原图参与,属于明水印的一种,因此可以有效用于版权方的版权保护。
An novel anti-rotation watermarking scheme which can restore the scale change adaptively based on scale invariable feature transformation（SIFT）is proposed.At first,the watermarking image is performed by the discrete cosine transform（DCT）and the holographic watermarking image is generated with the reference light;then the Y passage of carrier image is embedded through the discrete cosine transform.Finally,when extracting watermarking,we can restore scale change by SIFT adaptively and rotate angle by structural similarity（SSIM）after correction to extract watermarking information.Experimental results suggest that the algorithm has a good effect on efficiency against other common attacks.What is more,it has a strong fidelity watermarking data capacity,and can guarantee the same rotation correction precision and high-efficiency operation.The problem of stage anti-rotation attack watermarking technology is solved which is only available in angular correction at the same scale.This adaptive scale reduction of anti-rotation holographic watermarking technology can be effectively used for protecting the copyright.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2015年第7期1336-1341,共6页
Journal of Optoelectronics·Laser
基金
上海市教委科研创新重点项目(13ZZ111)
上海市研究生教育创新计划(JWCXSL1402)资助项目
