Building mosaics from video using MPEG motion vectors
Ryan C. Jones, Daniel DeMenthon, David Doermann · 1999
In this paper we present a novel way of creating mosaics from an MPEG video sequence. Two original aspects of our work are that (1) we explicitly compute camera motion between frames and (2) we deduce the camera motion directly from the motion vectors encoded in the MPEG video stream. This enables us to create mosaics more simply and quickly than with other methods. 1 Introduction The mass digitization of video has elevated automated storage and retrieval to a grand challenge. Video sequences can store a vast amount of useful information, but redundancy between individual frames is a problem when analyzing, browsing, or searching video. Presenting the video sequence in a compact manner is a difficult challenge because eliminating redundancy could also eliminate content. The selection of static keyframes to represent a shot sequence is commonly used for indexing as well as for presentation of retrieval results. This technique is insufficient for revealing much of the content in a vide...