NDLI: Robust and accurate optical flow estimation for weak texture and varying illumination conditions: Application to cystoscopy

Content Provider	IEEE Xplore Digital Library
Author	Ali, S. Daul, C. Blondel, W.
Copyright Year	2014
Description	Author affiliation: CRAN, Univ. de Lorraine, Vandœuvre-lès-Nancy, France (Ali, S.; Daul, C.; Blondel, W.)
Abstract	Robustness and accuracy of the existing optical flow algorithms can still be improved for noisy, low textured and poorly contrasted images. Most methods are based on the variational approach given by the Horn-Schunck model which can suffer from over-smoothing problems. In this paper, we propose to take into account the significant structural information of the images during optical flow computation. This will allow for discontinuities across the structure boundaries. In the data term, our optical flow model uses a classical brightness constancy assumption complemented by a modified Hessian constancy assumption based on shape structure. A constraint is added along with the regularization term, for handling the over-smoothing problems. Results on the Middlebury benchmark show the competitiveness of this algorithm. Quantitative optical flow results are given for different noise levels. Finally, application to registration of a complicated bladder cystoscopic data gives a qualitative analysis for robustness of this method.
Starting Page	1
Ending Page	6
File Size	1157211
Page Count	6
File Format	PDF
ISBN	9781479964628
ISSN	2154512X
e-ISBN	9781479964635
DOI	10.1109/IPTA.2014.7001947
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-14
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	bladder image mosaicing Image edge detection Brightness Estimation Lighting Bladder Optical imaging cancer diagnosis Robustness Hessian assumption Optical flow shape regularizer
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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