基于图像复杂度的PVD隐写算法

PVD Steganography Based Image Complexity

针对当前常用的数字图像隐写算法不能同时满足大嵌入量和高安全性的问题,提出了一种基于图像复杂度的PVD隐写算法。该算法通过计算每个块的统计特性来判断图像的复杂度。在复杂度低的图像块上通过产生伪随机序列来修改图像的像素值,以保证原始载体图像直方图统计特性,在复杂度高的图像上充分结合了PVD隐写算法的思想,提高了载体图像秘密信息的嵌入量和抗RS检测的能力。实验结果表明,与传统的数字隐写算法相比该算法具有较高的嵌入容量和较高的安全性。

For most current digital image steganography cannot meet the lots of data embedded and security, a new image - based complexity PVD steganography being proposed. By calculating the statistical characteristics of the each block, the approach can determine the complexity of the image. On the low complexity of the image, pixel values which is determined by pseudo - random sequence in order to ensuring the original image histogram statistical characteristics. On the high complexity of the image, combining the idea of the PVD embedding algorithm and Implementing based on image complexity PVD steganography, this approach increases the amount of data embedding and RS de- tection algorithm. Compared With traditional digital steganography, this algorithm has higher embed- ding capacity and strong statistical security.