The camera includes a sensor for sensing the photographer's iris image and registering the image in advance. The iris image is recorded in the image of a subject by a digital MCU at a timing different from that at which the image of the subject is captured. The recording timing is that at which the camera...http://www.google.ca/patents/US7305089?utm_source=gb-gplus-sharePatent US7305089 - Picture taking apparatus and method of controlling same
