Naslov
Optical Flow Estimation of the Heart Motion using Line Process

Autori
Bogunović, Hrvoje ; Lončarić, Sven

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

Izvornik
Proceedings of 4th IASTED Conference on Biomedical Engineering / - , 2005, 296-299

Skup
4th IASTED Conference on Biomedical Engineering

Mjesto i datum
Innsbruck, Austrija, 16.02.2005. - 18.02.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Cardiac motion estimation; optical flow; line process; MRF

Sažetak
This paper uses line process technique from computer vision to enhance optical flow computation for the problem of cardiac motion estimation. The basic idea is to introduce the line process as a tool for handling discontinuities of the optical flow field. Optical flow showing cardiac motion can then become piecewise smooth instead of globally smooth. Points of interest usually lie on the boundaries of the heart and this method is especially accurate at such points. The general problem is stated as a Bayes estimator and uses MRF framework to encode a priori knowledge. The MAP estimation is found as the minimum of the non-convex energy function using Highest Confidence First (HCF) algorithm. The advantages of HCF algorithm are that it is deterministic and the result is not dependant on the initialization step. The procedure is applied to ECG-gated MR image sequence of the beating heart.

Izvorni jezik
Engleski

Znanstvena područja
Računarstvo

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