数字水印算法的鲁棒性测试研究

Research on Testing the Robustness of Digital Watermarking Algorithm

鲁棒性是评价数字水印算法的关键指标,通过利用峰值信噪比、JPEG压缩、加噪以及相关均值比方法定量地比较、判断,在鲁棒性测试中将通常在图像处理中所用的差异比较方法引申至对数字水印原图像与提取出的水印图像的逼真度测试,并给出了相应的量度方法及测试结果,为数字水印算法鲁棒性进行安全性测试提供了更为直观、有效的方法。

The Robustness is a key indicator for appraising the digital watermarking algorithm. This article quantitatively compares and judges by using the Peak Signal to Noise Ratio, the JPEG compression, the plus noise as well as the correlative average value ratio, and expands the difference comparison method that is usually used in the image processing to the fidelity test between the original digital watermarking image and the extractive watermarking image during testing the robustness. This article further gives the corresponding measurement method and the testing result, thus provides intuitive and effective method for security test for the robustness of the digital watermarking algorithm. The further research of the content of this article has a vital significance to the formulation of an objective, fair and unified performance testing standard for the digital watermarking processing algorithm.