【摘要】 我们通常感兴趣的是所观察图像的一部分区域或者几部分区域中的内容,而非整幅图像中的信息,本文提出了一种改进的基于感兴趣区域(ROI)的数字水印嵌入算法。该算法采取Itti模型,直接对原图像进行ROI区域提取,并将区域矩形化,针对彩色图像三个通道RGB的不同特性,分别从空间域和变换域进行水印嵌入。仿真实验表明,所提出的水印嵌入算法能够有效抵御裁剪攻击、旋转攻击、缩放攻击、JPEG压缩攻击,而且对锐化、噪声、低通滤波等操作具有较好的鲁棒性。更多还原

【Abstract】 An improved ROI based digital watermarking algorithm was proposed because the viewer is always interested in one part or several parts of an image,instead of the whole information of the image.The algorithm extracted the ROI of the image by Itti model,making it to be a rectangular,and then embed the watermarking on both the space domain and transforming domain according to the different characteristics of three components of the color image.Simulation results show that the watermarking embed algorithm can effectively resist attacks of cropping,rotation,scaling and JPEG compress,and it is robust to the operation of sharpening,noise,low pass filter.更多还原