Method for determining motion vectors for the blocks of a source image sequence

Abstract

Abstract In the determination of motion vectors for the blocks of a source image sequence, hierarchical search methods are usually applied by using a block-matching error criterion. The motion vector found in a search step is used as starting value for improvement in subsequent search steps. In the invention, at least two motion vectors, in which the error criterion is smallest, are determined in a first search step in an image with reduced resolution. These motion vectors are interpolated to sub-pel accuracy and brought to a size which has validity for the non-reduced image. In the second search step, the search is refined in a small area surrounding these motion vectors and the zero vector and the motion vector is determined, for which the error criterion supplies the smallest value. <IMAGE>

Inventors

• 👤 Klaus Dr.-Ing. Hildenbrand
• 👤 Jörg Dipl.-Ing. Mayer

Bibliographic Details