I had the pleasure of attending a workshop on Image Authentication at the National Center for Media Forensics at the University of Colorado a few weeks ago. It was presented by Catalin Grigoras, PhD and we utilized multiple methods of analyzing still images to determine if an image is a camera original, and even some methods that can show specifically where images had been altered. The workshop also included PRNU analysis on both still and video images.

The workshop was an excellent overview of the various methods used in image authentication and an introduction to some of the tools that can be used for this application. Dr. Girgoras provided dozens of test images for us to run through the various tools, and provided time to discuss each case.

For anyone working in the field of image authentication, this is a worthwhile course to take. It will provide a better understanding of the tools and processes available to determine whether an image is what it purports to be.