Each conference partner, or speaker sits at his local station. The station is equipped with multiple cameras acquiring images of the speaker from several points of view, and a screen, showing the other conference speakers around a virtual table. This work concentrates on the computer vision modules necessary to create a convincing impression of telepresence , and brings three main contributions. A schematic diagram of the system is shown in Figure. Three main modules compose the system Change detection identifies the pixels at which the intensity has changed significantly from the previous frame.
Dynamic stereo matching adopts block matching based on a correlation metric.
We have developed a fast algorithm for maintaining a dynamic disparity map through a stereo sequence, based on change detection. View synthesis projects pairs of corresponding points from a stereo pair of images onto a third view identified by a virtual position. The algorithm adopted is based on the trilinear constraint between three views. Li-Qun Xu is with the British Telecom Research Laboratories.