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投影与光照方向一致性的图像篡改检测

DOI: 10.13190/j.jbupt.2014.05.013, PP. 61-65

Keywords: 光照方向,朗伯模型,投射阴影,篡改检测

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Abstract:

针对在自然光照条件下拍摄的图像遭到篡改的情况,提出了一种新的篡改检测方法.光照射到物体上在物体表面会发生漫反射现象,同时会在投影平面上产生阴影,一旦图像遭到篡改很难保持这些自然特征的一致性.因此,根据物体表面估计出的光照方向与投射阴影得到的光源区域的一致性,不仅可以检测有多个物体的篡改图像,还可以检测出只有1个物体的图像是否被篡改.

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