“…However, if there are more images available from the same, unknown source, e.g. the frames in a video file [ [49] , [50] , [58] , [91] , [92] , [93] , [94] , [95] , [97] , [98] ], much better estimations of the PRNU pattern can be obtained by averaging techniques. In the newer cameras one has to compensate for motion compensation [ 82 , 84 , 88 , 90 ].…”