摘要
随着计算机和因特网技术的发展,数字水印技术开始广泛应用于数字图像、音频、视频和多媒体产品的版权保护。该文提出了一种在分块DCT的低频交流系数中利用周期函数的性质并结合加密技术和JPEG量化系数嵌入有含义的水印图像,并可以盲检测。实验结论和攻击测试表明,该文所提出的算法,对如JPEG有损压缩、椒盐噪声、中值滤波、对比度增强、和γ校正等各种的图像处理有很强的稳健性。同时还具有容易用软件或硬件实现的特点。
<Abstrcat>A digital watermark is an invisible mark embedded in digital images, video, or audio documents, which may be used for a number of different purposes including copyright protection, authentication, and captioning. Incorporation with the property of periodic function, encryption technology and JPEG quantification coefficient,a new blind meaningful image watermarking method based on block discrete cosine transform (DCT) AC coefficient is proposed. Experiments and attack test show that the algorithm has good robustness on JPEG ,pepper noise, median filter, contrast enhancement and γ revision . Moreover the proposed algorithm can be easily implemented by the existing software or hardware systems only with small modification.
出处
《计算机仿真》
CSCD
2005年第5期104-106,共3页
Computer Simulation
