Video Analysis in Pan-Tilt-Zoom Camera Networks

Exploiting Single View Geometry in Pan-Tilt-Zoom Camera Networks

PTZ (pan-tilt-zoom) camera networks have an important role in surveillance systems. They have the ability to direct the attention to interesting events that occur in the scene. In order to achieve such behavior the cameras in the network use a process known as sensor slaving: one (or more) master camera monitors a wide area and tracks moving targets so as to provide the positional information t...

Video Streaming with Interactive Pan/Tilt/Zoom

High-spatial-resolution videos offer the possibility of viewing an arbitrary region-of-interest (RoI) interactively. The user can pan/tilt/zoomwhile watching the video. This chapter presents spatial-random-access-enabled video compression that encodes the content such that arbitrary RoIs corresponding to different zoom factors can be extracted from the compressed bit-stream. The chapter also co...

Towards Calibrating a Pan-Tilt-Zoom Camera Network

In this paper we discuss the problem of recovering the calibration of a network of pan-tilt-zoom cameras. The intrinsic parameters of each camera over its full range of zoom settings are estimated through a two step procedure. We first determine the intrinsic parameters at the camera's lowest zoom setting very accurately by capturing an extended panorama. Our model includes two parameters of ra...

Appearance sphere: background model for pan-tilt-zoom camera

Relative Orientation Estimation of Video Streams from a Single Pan-tilt-zoom Camera

As a surveillance camera for the security of urban area, a single pan-tilt-zoom (PTZ) camera has been used. For effective application of the video sequence of the single PTZ camera, accurate orientation or calibration of the video sequence is needed. This paper proposes a mathematical model based on the collinearity condition equation for relative orientation estimation between frames from vide...