This paper introduces a long-range multi-biometric system by integrating hierarchical camera system design, human detection and tracking, face detection and pose estimation, NIR laser illumination, and iris acquisition by a PTU and long focal length zoom lens. The system proposed by the paper is sound. Hierarchical design and error-correction steps are introduced in an attempt to make the system robust in real world scenarios. The main concern is two folds: the low resolution of the acquired iris images, and the processing time between frames. Low resolution iris images may lead to significantly decreased accuracy in biometric-based recognition. And the long processing time (due to detection, tracking, etc.) may prevent the system from being applicable to acquiring iris images of moving subjects.
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