What is Image Sensor

Whether investigating individual photographs or a large repository of images, it is often critical to establish some history of the generation, manipulation and/or distribution of the images, which is to say the provenance. The applications of image provenance are wide, including the detection of steganographic messages and image tampering, the clustering of images with like provenance, and the gathering of evidence which establishes (or refutes) a hypothetical source. This chapter considers published research and identifies research gaps which address the general challenges of digital image provenance with an explicit emphasis on evidence related to the camera or other digital source.