TY - GEN
T1 - A direct method to self-calibrate a surveillance camera by observing a walking pedestrian
AU - Kusakunniran, Worapan
AU - Li, Hongdong
AU - Zhang, Jian
PY - 2009
Y1 - 2009
N2 - Recent efforts show that it is possible to calibrate a surveillance camera simply from observing a walking human. This procedure can be seen as a special application of the camera self-calibration technique. Several methods have been proposed along this line, but most of them have certain restrictions, such as require the human walking at a constant speed, or require two orthogonal lines marked on the ground, etc. This has hindered their applicability. In this paper we propose a new method that removes most of these restrictions. By clever uses of the cross-ratio relationship in projective geometry, our method shows it is possible to directly estimate a full 3 x 4 camera projection matrix without first decomposing it into physical parameters like focal-length, optical center, etc. Extensive experiments on real data show our algorithm performs well in real situations.
AB - Recent efforts show that it is possible to calibrate a surveillance camera simply from observing a walking human. This procedure can be seen as a special application of the camera self-calibration technique. Several methods have been proposed along this line, but most of them have certain restrictions, such as require the human walking at a constant speed, or require two orthogonal lines marked on the ground, etc. This has hindered their applicability. In this paper we propose a new method that removes most of these restrictions. By clever uses of the cross-ratio relationship in projective geometry, our method shows it is possible to directly estimate a full 3 x 4 camera projection matrix without first decomposing it into physical parameters like focal-length, optical center, etc. Extensive experiments on real data show our algorithm performs well in real situations.
KW - Camera calibration
KW - Object tracking
KW - Video surveillance
UR - http://www.scopus.com/inward/record.url?scp=77950309277&partnerID=8YFLogxK
U2 - 10.1109/DICTA.2009.49
DO - 10.1109/DICTA.2009.49
M3 - Conference contribution
SN - 9780769538662
T3 - DICTA 2009 - Digital Image Computing: Techniques and Applications
SP - 250
EP - 255
BT - DICTA 2009 - Digital Image Computing
T2 - Digital Image Computing: Techniques and Applications, DICTA 2009
Y2 - 1 December 2009 through 3 December 2009
ER -