基于DCT域的特定系数关系的盲水印算法

文章提出了一种基于DCT变换域的数字水印算法.设计并实现了一种基于Arnold置乱理论并结合混沌序列加密的水印图像预处理方法;并根据水印信息对DCT中频系数范围内的两个特定系数进行替换,最终实现水印信息的嵌入.该水印算法在检测时不需要原始图像的参与,完全实现了盲提取.仿真实验和性能分析证明,该算法不仅具有良好的不可见性,而且在抗JPEG压缩、噪声和滤波等攻击方面表现出较强的鲁棒性.

Specific Coefficient of Blind Watermarking Algorithm Based on DCT Domain

Based on Discrete Cosine Transform(DCT)domain digital watermark algorithm is proposed.The watermark image pretreatment method is designed and implemented based on the Arnold scrambling theory and chaos sequence encryption;Two specific coefficients in the DCT middle frequency coefficients are replaced based on watermark information,and finally realize the embedding of watermark information.Watermark detection in the watermarking algorithm does not require the participation of the original image,which is fully blind extraction.Simulation and performance analysis show,the algorithm not only has good invisibility,but show a stronger robustness in resisting some common image attacks such as JPEG compression,noise and filtering as well.