Speaker:Abby Martin

The Effects of Improper Exposure on Forensic Camera Identification

Photo-response non-unformity (PRNU) is a technology that can match a digital photograph to the camera that took it.  Prior work has claimed an error rate (false alarms / false positives) of 24 in a million, but that work may not have accommodated images that are off-nominal, e.g., too light or too dark.  Because the data from earlier studies are no longer available, we constructed a new data set comprised of 8400 images ranging from under-exposed to nominally exposed to over-exposed.  Using analytical methods from earlier work, we find that error rate is one in 200 when the data include off-nominal images.

Committee: Jin Tian (co-major professor), Jennifer Newman (co-major professor), Roy Maxion, Danica Ommen, and Michael Catanzaro.

Join on Zoom: https://iastate.zoom.us/j/94570737697?pwd=aFNJSXpIWGl4UDVQOU96SlU0WFFRZ…;