Abstract
In order to develop a video retrival technique, this paper discusses a searching algorithm based on motion vectors(MV) in MPEG bistreams. We first give an MV estimation technique for MPEG which estimates precise and coherent MV fields while keeping the coding efficiency as high as possible. We then propose a retrival algorithm based on motion histgrams. By varying block sizes from which the motion histgrams are extracted, a hierarchical retrieval scheme can be realized. Finally, we show a GUI system which converts user's aiming into retrieval keys, and some simple experimental results using the GUI will be given.
