期刊
COMPUTERIZED MEDICAL IMAGING AND GRAPHICS
卷 37, 期 5-6, 页码 409-417出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compmedimag.2013.04.004
关键词
Retinal image analysis; Optic disc localization; Retinal vessel segmentation; Entropy
资金
- FEDER funds through the Programa Operacional Factores de Competitividade - COMPETE
- Portuguese funds through FCT - Fundacao para a Ciencia e a Tecnologia [PEst-C/SAU/LA0002/2011]
This paper describes a new methodology for automatic location of the optic disc in retinal images, based on the combination of information taken from the blood vessel network with intensity data. The distribution of vessel orientations around an image point is quantified using the new concept of entropy of vascular directions. The robustness of the method for OD localization is improved by constraining the search for maximal values of entropy to image areas with high intensities. The method was able to obtain a valid location for the optic disc in 1357 out of the 1361 images of the four datasets. (C) 2013 Elsevier Ltd. All rights reserved.
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