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. 2011 Jun 30;17(2):111–119. doi: 10.4258/hir.2011.17.2.111

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© 2011 The Korean Society of Medical Informatics

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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(A) Ciliary epithelial cells with cilia on the top. (B) Vector field of optical flow show the direction and magnitude of change of ciliary beating intensity from one image to the other. (C) Difference image between two consecutive frames.