Date Added: Jan 2011
Iris image acquisition is the fundamental step of the iris recognition, but capturing high-resolution iris images in real-time is very difficult. The most common systems have small capture volume and demand users to fully cooperate with machines, which has become the bottleneck of iris recognition's application. In this paper, the authors aim at building an active iris image acquiring system which is self-adaptive to users. Two low resolution cameras are co-located in a Pan-Tilt-Unit (PTU), for face and iris image acquisition respectively. Once the face camera detects face region in real-time video, the system controls the PTU to move towards the eye region and automatically zooms, until the iris camera captures a clear iris image for recognition.