一种考虑水印特征隐藏三维数字图像保护方法

Method of Three Dimensional Digital Image Protection Based on Watermark Hidden Features

针对传统三维数字图像嵌入水印算法保留的水印特征信息过多,易被攻击的弊端,提出了一种考虑水印特征隐藏的三维数字图像保护方法,对于待加入水印的三维数字图像,引入分块DCT算法对原始图像进行水印特征隐藏处理并得到水印特征隐藏图元矩阵,再将水印图像通过BCH编码进行特征隐藏降噪压缩。根据设定的特征隐藏系数随机分配图元位置并插入原始图像中,得到包含特征隐藏水印的数据图像。仿真结果表明,该方法嵌入的特征隐藏水印不仅可抵抗多种不同类型攻击,比传统算法抗噪声攻击性提高了约25%,抗剪切攻击性提高了15%左右。

In view of the traditional three-dimensional digital image watermark algorithm retains the watermark information is overmuch, the disadvantages of vulnerability, this paper proposes a consider hidden three-dimensional digital image wa-termarking features protection method, for to join 3 d digital image watermark, introducing block DCT algorithm to the origi-nal image for watermarking features hidden process, and get the watermark hidden primitive matrix, then the watermark im-age features hidden noise reduction by BCH coding compression. According to a set of primitive features hidden coefficient randomly assigned position and insert in the original image, get contains features hidden watermark data image. Simulation results show that this method is characteristic of the embedded hidden watermark can resist a variety of different types of at-tacks, not only about 25% higher than that of traditional algorithm noise attack resistance, resistance to shear attack in-creased by 15%.