Title :
Robust region-based motion estimation for video compression
Author :
Teh, Jonathan S Y ; Spann, Michael
Author_Institution :
Sch. of Electron. & Electr. Eng., Birmingham Univ., UK
Abstract :
This paper presents a region-based motion estimation algorithm for use in video compression systems. It is based on overlapping block motion estimation with a least-median of squares (LMedS) error measure to estimate the initial motion field. The overlapping blocks improve the motion estimate for each pixel. The block-based motion field is subsequently segmented into various regions of coherent motion and the segmentation is refined in a rate-distortion framework. Region boundaries are then estimated and refined in an iterative procedure. The results show significantly lower prediction errors compared to other block-based approaches
Keywords :
data compression; image segmentation; iterative methods; least mean squares methods; motion estimation; rate distortion theory; video coding; block motion estimation; block-based motion field; coherent motion regions; image segmentation; initial motion field estimation; iterative procedure; least-median of squares error measure; overlapping blocks; pixel; prediction errors; rate-distortion; region boundaries estimation; region-based motion estimation algorithm; robust region-based motion estimation; video compression systems; Design for disassembly; Image segmentation; Image sequences; Motion compensation; Motion estimation; Motion measurement; Optical computing; Robustness; Spline; Video compression;
Conference_Titel :
Image Processing, 2000. Proceedings. 2000 International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-6297-7
DOI :
10.1109/ICIP.2000.901092
