基于秘密分享和直方图平移的多图像水印算法

Multi-Image Watermarking Algorithm Based on Secret Sharing and Histogram Shifting

摘要: 针对目前图像水印算法存在的嵌入容量小和安全性弱的问题，利用秘密分享方案将一幅水印图像分解成多幅影子图像，再通过直方图平移算法把影子图像分别嵌入到多幅载体图像中，从而提出了一种基于秘密分享和直方图平移的多图像水印算法。在该算法中，若仅有一幅影子图像将无法提取出水印图像，需要有其他影子图像，从而提高了图像水印算法的安全性。同时，通过增加载体图像的数量，可扩大图像水印算法的嵌入容量。算法分析和实验结果表明该算法的可行性。

Abstract: To solve the problems of small embedding capacity and low security of image watermarking algo-rithm, a watermarking image can be decomposed into multiple shadow images with the secret sharing algorithm, and then the shadow images can be embedded into multiple carrier images by histogram shifting. This paper proposes a multi-image watermarking algorithm based on secret sharing and histogram shifting. In this algorithm, the watermarking image cannot be extracted by only one shadow image, and other shadow images must be used. Therefore, the algorithm security is improved. Meanwhile, the embedding capacity of image watermarking can be enlarged by in-creasing the number of carrier images. Algorithm analyses and experimental results show that the proposed algorithm is feasible.