Dark Signal Non-Uniformity for Source Camera Identification

Source camera identification is the task of determining the camera that captured an image. This is often performed using the photo response non-uniformity (PRNU) as the camera fingerprint. However, there is another sensor non-uniformity: the dark signal non-uniformity (DSNU), which has been less extensively studied in the forensic community. In this work, we prove that the DSNU can be used to perform source camera identification and present a systematic study of this signal.