Scientists have developed a new technique which can recover the faces of bystanders from reflections in the eyes of photographic subjects, a development that could help identify criminals. As the most commonly photographed objects are faces, there is potential in mining detailed facial images for hidden information, researchers said. Until now, photographers might reasonably have assumed that their own face was absent from the image. But research, led by Dr Rob Jenkins from University of York overturns this assumption. By zooming in on high-resolution passport-style photographs, Jenkins and co-researcher, Christie Kerr from the University of Glasgow were able to recover the faces of bystanders from reflections in the eyes of photographic subjects. The recovered bystander images could be identified accurately by observers, despite their low resolution. To establish whether these bystanders could be identified from the reflection images, the researchers presented t...