Naslov
Global motion estimation using variable block sizes and its application to object segmentation

Autori
Arvanitidou, Marina Georgia ; Glantz, Alexander ; Krutz, Andreas ; Sikora, Thomas ; Mrak, Marta ; Kondoz, Ahmet

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 10th Workshop on Image Analysis for Multimedia Interactive Services, WIAMIS 2009 / - London : Delhi, 2009, 173-176

Skup
10th Workshop on Image Analysis for Multimedia Interactive Services, WIAMIS 2009

Mjesto i datum
London, Ujedinjeno Kraljevstvo, 06.05.2009. - 08.05.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Global Motion Estimation; Variable Block Sizes; Object Segmentation

Sažetak
Global motion is estimated either in the pixel domain or in block based domain. Until now, all the approaches regarding the latter are based on fixed sized blocks while the recent compression methods tend to use variable block sizes during motion estimation. In this paper we present a new procedure for global motion estimation based on a variable block size motion vector field. A block matching algorithm which is able to adapt the block size according to the motion complexity within the frame is used. The resulting motion vectors are employed for global motion estimation. Furthermore, binary foreground-background masks are created based on the frame-by-frame motion compensated differences by exploiting spatial conditions through anisotropic diffusion filtering. For global motion estimation the performance evaluation in terms of background PSNR shows an enhancement of more than 2.5 dB in the well-known "Stefan" sequence, compared to the conventional case of fixed block size, at a reasonable implementation complexity.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Računarstvo

POVEZANOST RADA