PRNU Based Source Camera Identification for Webcam Videos
This work addresses source camera identification for webcam videos, which is important for image forensics applications, but it appears incremental as it applies existing PRNU techniques to a new data type (video) rather than introducing a novel method.
The paper tackled the problem of identifying the source camera of webcam videos using sensor fingerprints based on Photo Response Non-Uniformity (PRNU), implementing and assessing three methods for source camera identification.
This communication is about an application of image forensics where we use camera sensor fingerprints to identify source camera (SCI: Source Camera Identification) in webcam videos. Sensor or camera fingerprints are based on computing the intrinsic noise that is always present in this kind of sensors due to manufacturing imperfections. This is an unavoidable characteristic that links each sensor with its noise pattern. PRNU (Photo Response Non-Uniformity) has become the default technique to compute a camera fingerprint. There are many applications nowadays dealing with PRNU patterns for camera identification using still images. In this work we focus on video, more specifically on webcam video, because of the great importance of webcam video nowadays. Three possible methods for SCI are implemented and assessed in this work.