基于Lambert-Phong模型的图像盲取证方法  

Method of blind image forensics based on Lambert-Phong model

作　　者：杜宏业[1] 姚望舒[1] 

机构地区：[1]苏州大学计算机科学与技术学院,江苏苏州215006

出　　处：《计算机应用》2012年第11期3171-3173,共3页journal of Computer Applications

基　　金：国家自然科学基金资助项目(61033013);江苏省自然科学基金资助项目(BK2009583);校青年基金资助项目(Q3118814)

摘　　要：由于现有的图像盲取证方法中所使用的光照模型不能有效地表征物体表面的实际光照效果,提出Lambert-Phong光照模型。该模型同时考虑光照的漫反射和镜面反射,利用该光照模型对无限光源模式下的图像进行蓄意修改检测。实验结果表明,Lambert-Phong光照模型能较准确地计算出图像中不同目标的光照方向,有效地判别出图像是否经过蓄意修改。Since the illumination model used in existing methods of blind image forensics could not effectively represent surface lighting effects,Lambert-Phong illumination model was proposed which contained the diffusing and specular reflection of light.Leveraging this illumination model on the tampering detection of infinite light source image,the experimental results show that the illumination direction of different objects in images could be calculated accurately using the proposed illumination model,and the image tampering could be effectively identified.

关 键 词：光照模型 无限光源图像 光照方向 图像盲取证 图像修改 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]