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Optical Flow Estimation of the Heart Motion using Line Process (CROSBI ID 508272)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

Bogunović, Hrvoje ; Lončarić, Sven Optical Flow Estimation of the Heart Motion using Line Process // Proceedings of 4th IASTED Conference on Biomedical Engineering. 2005. str. 296-299-x

Podaci o odgovornosti

Bogunović, Hrvoje ; Lončarić, Sven

engleski

Optical Flow Estimation of the Heart Motion using Line Process

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.

Cardiac motion estimation; optical flow; line process; MRF

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Podaci o prilogu

296-299-x.

2005.

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objavljeno

Podaci o matičnoj publikaciji

Proceedings of 4th IASTED Conference on Biomedical Engineering

Podaci o skupu

4th IASTED Conference on Biomedical Engineering

predavanje

16.02.2005-18.02.2005

Innsbruck, Austrija

Povezanost rada

Računarstvo