Exposing Digital Image Forgeries by Detecting Inconsistence in Light Source Direction
Yanling Zhu · Beijing Youdian Xueyuan xuebao · 2011
By extracting the edge information of the target object in single digital image,the light direction can be estimated.In order to improve the efficiency of the estimated light direction,the image edge detection operators are brought in which achieves the accurate orientation of the target object in the fake image.With the combination of border fitting and data analysis,thus a procedure of detecting image tampering which is based on the inconsistencies in light source direction is formed.Experimental results show that edge detection operators optimize the detecting process,also improve the feasibility and expandability of this forensic technology.