Title :
Measurement of ocular torsion using iterative Lucas-Kanade optical flow method
Author :
Lee, I.B. ; Park, K.S.
Author_Institution :
IEEE Interdisciplinary Program of Med. & Biol. Eng. Major, Seoul Nat. Univ.
Abstract :
This paper presents a new method for measuring ocular torsion using the optical flow. Iris image is cropped and transformed into rectangular image to make an orientation invariant image. Feature points were selected at iris region from a reference and a target image, and then shift of each feature was calculated using iterative Lucas-Kanade method. The feature points were selected according to the strength of corner on the iris image. The accuracy of the algorithm was tested using printed eye image and compared with traditional cross-correlation method. Measurement error was less than 0.15deg
Keywords :
biomechanics; biomedical optical imaging; eye; image sequences; iterative methods; medical image processing; torsion; cross-correlation method; feature points; iris image; iterative Lucas-Kanade optical flow method; ocular torsion; orientation invariant image; printed eye image; Biomedical imaging; Biomedical measurements; Data mining; Fluid flow measurement; Image converters; Image motion analysis; Iris; Iterative methods; Shape measurement; Target tracking; Ocular torsion; optical flow;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1615971
