Panoramic video representation using mosaic image

摘要

This paper presents a novel approach of video representation with panoramic techniques for low bit-rate video transmission. Using a background panorama as a prior information, fore-ground objects in a video sequence are separated from the background through a series of segmentation processes. These fore-ground segments are encoded by traditional compression techniques and transmitted as a video stream, while the scene background is transmitted only once as a panorama. To reconstruct the original video frame, foreground panoramic segment on-the-fly at the receiving side. Experiments show that our approach improves the compression performance, compared with MPEG-1 under the same quality factor. Our system can synthesize virtual environments without using blue-screen. The users can navigate throughout the scene or examine any particular details. Our system also provides an effective solution to scene-based video indexing.