Digital Image & Video Forensics deal with the problem of certifying the authenticity of picture and digital video data, or its origin, without explicit a priori information, e.g. using watermarks.
Three are the main branches in Image Forensics research field:
1) image source identification;
2) discrimination of computer generated images;
3) image forgery detection.
We developed some methods that detect image tampering, with particular attention to copy move forgery.
We are also investigating effective video forensic strategies aimed at reconstructing the processing history of the video data under investigation and validating their origins. The key assumption of these techniques is that most alterations are not reversible and leave in the reconstructed signal some “footprints”, which can be analyzed in order to identify the previous processing steps.