Title :
Enhancement of the Horn and Schunck optic flow algorithm by means of median filters
Author :
Bartolini, Franco ; Piva, Alessaiidro
Author_Institution :
Dipt. di Ingegneria Elettronica, Firenze Univ., Italy
Abstract :
For optic flow computation the Horn and Schunck (1980) algorithm is one of the most used and powerful. Some drawbacks are, nevertheless, intrinsically related to the approach that it used. A smoothness constraint is imposed to the flow field in order to produce a solution. This constraint causes the estimated field to be incorrect where motion discontinuities are present. The weight of this smoothness constraint is reduced by using median filters. Motion boundaries are better preserved by the modified algorithm. Results are presented and possible developments are proposed
Keywords :
image segmentation; median filters; motion estimation; smoothing methods; Horn and Schunck optic flow algorithm; estimated field; flow field; median filters; modified algorithm; motion boundaries; motion discontinuities; smoothness constraint; Electronic mail; Equations; Image motion analysis; Motion estimation; Nonlinear optics; Optical computing; Optical devices; Optical filters; Pixel; Video coding;
Conference_Titel :
Digital Signal Processing Proceedings, 1997. DSP 97., 1997 13th International Conference on
Conference_Location :
Santorini
Print_ISBN :
0-7803-4137-6
DOI :
10.1109/ICDSP.1997.628385
