Face Recognition at a Distance
Face recognition systems typically have a rather short operating distance with standoff (distance between the camera and the subject) limited to 1~2 meters. When these systems are used to capture face images at a larger distance (5 m), the resulting images contain only a small number of pixels on the face region, resulting in a degradation in face recognition performance. To address this problem, we propose dual camera system consisting of PTZ and static cameras to acquire high resolution face images up to a distance of 12 meters. The proposed camera system utilizes the coaxial and concentric configuration between the static and PTZ cameras to achieve distance invariance PTZ camera control. We also use a linear prediction model and camera control scheme to mitigate delays in image processing and mechanical camera motion. The proposed system has a larger standoff in face image acquisition and effectiveness in face recognition test.
H. Maeng, S. Liao, D. Kang, S.-W. Lee, and A. K. Jain, "Nighttime Face Recognition at Long Distance: Cross-distance and Cross-spectral Matching", ACCV, Daejeon, Korea, Nov. 5-9, 2012.
H. Maeng, H.-C. Choi, U. Park, S.-W. Lee, and A. K. Jain, "NFRAD: Near-Infrared Face Recognition at a Distance", IJCB, Washington, DC, Oct. 11-13, 2011.
H.-C. Choi, U. Park, and A. K. Jain, "PTZ Camera Assisted Face Acquisition, Tracking & Recognition," Biometrics: Theory, Applications and Systems (BTAS), 2010.