要实现篡改图像的恢复，就要有足够多的图像信息。
To recover the distorted images, we must have enough image information.
实验结果表明，该方法对于鉴别拼接而成的篡改图像有显著效果。
Experiment results show its effectiveness in detecting forgery part in spliced images.
本文在对数字图像的一些统计特性进行研究的基础上，提出了两个检测篡改图像的算法。
Two algorithms of detecting the digital forgeries are proposed in this paper. They are based on the study of some statistical properties of digital images.
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