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Exudate detection in color retinal images for mass screening of diabetic retinopathy.

Abstract：

:The automatic detection of exudates in color eye fundus images is an important task in applications such as diabetic retinopathy screening. The presented work has been undertaken in the framework of the TeleOphta project, whose main objective is to automatically detect normal exams in a tele-ophthalmology network, thus reducing the burden on the readers. A new clinical database, e-ophtha EX, containing precisely manually contoured exudates, is introduced. As opposed to previously available databases, e-ophtha EX is very heterogeneous. It contains images gathered within the OPHDIAT telemedicine network for diabetic retinopathy screening. Image definition, quality, as well as patients condition or the retinograph used for the acquisition, for example, are subject to important changes between different examinations. The proposed exudate detection method has been designed for this complex situation. We propose new preprocessing methods, which perform not only normalization and denoising tasks, but also detect reflections and artifacts in the image. A new candidates segmentation method, based on mathematical morphology, is proposed. These candidates are characterized using classical features, but also novel contextual features. Finally, a random forest algorithm is used to detect the exudates among the candidates. The method has been validated on the e-ophtha EX database, obtaining an AUC of 0.95. It has been also validated on other databases, obtaining an AUC between 0.93 and 0.95, outperforming state-of-the-art methods.

journal_name

Med Image Anal

journal_title

Medical image analysis

authors

Zhang X,Thibault G,Decencière E,Marcotegui B,Laÿ B,Danno R,Cazuguel G,Quellec G,Lamard M,Massin P,Chabouis A,Victor Z,Erginay A

doi

10.1016/j.media.2014.05.004

subject

Has Abstract

pub_date

2014-10-01 00:00:00

pages

1026-43

issue

7

eissn

1361-8415

issn

1361-8423

pii

S1361-8415(14)00069-3

journal_volume

18

pub_type

杂志文章

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