照片的公有水印防伪算法

照片的数字水印防伪处理是通过在原始照片中嵌入数字水印来证实照片所有权的过程。数字水印于少应具有如下特征：安全性、鲁棒性和透明性。公有水印技术是水印提取或检测时不需要原始照片参与。本文提出了一种改进的利用DCT系数量化的有水印算法。实验结果表明，该算法有相当好的鲁棒性，可以应用于照片防伪。

Public Watermarking Algorithms Against Photo Forgery

The digital watermarking technique against photo forgery is a process of embedding a signal into original photos to establish ownership. Digital watermarks are required to satisfy the following three characteristics: security, robustness and transparency. The public watermarking technique can extract or detect watermarks without the original photo. A modified public watermarking algorithm based on the quantization of DCT coefficients is presented in this paper. Experimental results show that this algorithm is quite robust, so it can be used to fight against photo forgery.