Researchers at Binghamton University, State University of New York have applied for two patents for techniques to reliably link digital images to the camera that took them. The process analyses images, looking for variations caused by irregularities in the manufacturing process of the camera and its sensors that are unique to each camera. The analysis was 100% accurate in tests with 27,000 images taken by nine cameras. The technique can also indicate where an image has been modified, by showing where the expected pattern for a camera is missing.
The researchers expect the technique to be useful to law enforcers investigating child pornography cases.