Institute of Electrical & Electronic Engineers
Face recognition has been regarded as an effective method for subject identification at a distance because of its covert and remote sensing capability. However, face images have a low resolution when they are captured at a distance (say, larger than 5 meters) thereby degrading the face matching performance. To address this problem, the authors propose an imaging system consisting of static and Pan-Tilt-Zoom (PTZ) cameras to acquire high resolution face images up to a distance of 12 meters. They propose a novel coaxial-concentric camera configuration between the static and PTZ cameras to achieve the distance invariance property using a simple calibration scheme.