基于光照方向不一致性的图像盲鉴别方法

图像篡改破坏了自然图像的光照一致性，为了保证图像内容的安全性，提出一种基于光照方向一致性的图像盲鉴别方法鉴别图像真伪。该方法根据图像的实际强度与计算强度间的误差函数以及适合不同光源模式的约束条件,估计不同光源模式下图像的光照方向。通过分析图像中不同对象或对象与背景之间的光照方向是否一致，判断图像是否被篡改。实验结果表明,无限光源模式的数字图像盲鉴别方法的正确检测率可达到81.8%，从而证明了局部光源和复合光源模式的数字图像盲鉴别方法的有效性。

Blind Identification for Digital Images Based on Inconsistency of Illuminant Direction

Image tampering will destroy the light coherence of natural images.In order to ensure the security of image content,this paper presents a blind identification method based on the consistency of illuminant direction to identify the image authenticity.In accordance with the error function between the measured intensity and calculated intensity,and the regularization terms for different source models,this method estimates the illuminant direction for images of different source models.Analyzing if the illuminat...