Advanced motion estimation for standards conversion and slow motion
Manfred Ernst, M. Grasse, H. D. Hoehne, T. Dalstein · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1993
This paper describes an advanced method for motion estimation and interpolation for frame rate conversion and slow motion generation of HDTV. The concept is based on a 3-D space- and time-variant filter that is adapted to the motion. Motion is estimated by using a modified block matching algorithm. The main problems of basic motion estimation algorithms are analyzed. The resulting motion information becomes unacceptable, especially in image areas with periodical structures, in the presence of noise or on moving object boundaries. The target of this approach is to increase the reliability of motion information in those image areas and the detection of occluding, appearing and disappearing areas. The spatio/temporal cut-off frequencies of the interpolation filter are controlled taking into account this information. Results of computer simulation are presented on a set of sequences, which are critical with respect to the spatial resolution and the motion complexity.