TY - GEN
T1 - Calibrating pan-tilt cameras with telephoto lenses
AU - Xinyu, Huang
AU - Jizhou, Gao
AU - Ruigang, Yang
PY - 2007
Y1 - 2007
N2 - Pan-tilt cameras are widely used in surveillance networks. These cameras are often equipped with telephoto lenses to capture objects at a distance. Such a camera makes full-metric calibration more difficult since the projection with a telephoto lens is close to orthographic. This paper discusses the problems caused by pan-tilt cameras with long focal length and presents a method to improve the calibration accuracy. Experiments show that our method reduces the re-projection errors by an order of magnitude compared to popular homography-based approaches.
AB - Pan-tilt cameras are widely used in surveillance networks. These cameras are often equipped with telephoto lenses to capture objects at a distance. Such a camera makes full-metric calibration more difficult since the projection with a telephoto lens is close to orthographic. This paper discusses the problems caused by pan-tilt cameras with long focal length and presents a method to improve the calibration accuracy. Experiments show that our method reduces the re-projection errors by an order of magnitude compared to popular homography-based approaches.
UR - http://www.scopus.com/inward/record.url?scp=38149076534&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38149076534&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:38149076534
SN - 9783540763857
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 127
EP - 137
BT - Computer Vision - ACCV 2007 - 8th Asian Conference on Computer Vision, Proceedings
T2 - 8th Asian Conference on Computer Vision, ACCV 2007
Y2 - 18 November 2007 through 22 November 2007
ER -