Calibrating Pan-Tilt Cameras with Telephoto Lenses

Abstract. 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 homographybased approaches.

• Type: Conference
• Year: 2007
• Where: ACCV
• Authors: Xinyu Huang, Jizhou Gao, Ruigang Yang
• Keywords: ACCV 2007, Computer Vision, Long Focal Length, Pan-tilt Cameras, Telephoto Lenses