Layered Representation of a Video Shot with Mosaicing |
| |
Authors: | E Trucco F Odone A Fusiello |
| |
Affiliation: | (1) INFM – DISI, Universitá di Genova, Genova, Italy, IT;(2) Dipartimento di Informatica, Universitá di Verona, Verona, Italy, IT;(3) Department of Computing and Electrical Engineering, Heriot-Watt University, Edinburgh, UK, GB |
| |
Abstract: | : This paper presents a motion segmentation method useful for representing efficiently a video shot as a static mosaic of
the background plus sequences of the objects moving in the foreground. This generates an MPEG-4 compliant, layered representation
useful for video coding, editing and indexing. First, a mosaic of the static background is computed by estimating the dominant motion of the scene. This is achieved by tracking features over the video sequence and using a robust technique that discards features
attached to the moving objects. The moving objects get removed in the final mosaic by computing the median of the grey levels.
Then, segmentation is obtained by taking the pixelwise difference between each frame of the original sequence and the mosaic
of the background. To discriminate between the moving object and noise, temporal coherence is exploited by tracking the object
in the binarised difference image sequence. The automatic computation of the mosaic and the segmentation procedure are illustrated
with real sequences experiments. Examples of coding and content-based manipulation are also shown.
Received: 31 August 2000, Received in revised form: 18 April 2001, Accepted: 20 July 2001 |
| |
Keywords: | : Content-based representation Mosaicing Motion segmentation MPEG-4 Video coding Video sequence analysis |
本文献已被 SpringerLink 等数据库收录! |
|