Bhalerao, Abhir, Patanaik, Amiya, Anand, Sarabjot S. and Saravanan, Pounnusamy (2008) Robust detection of microaneurysms for sight threatening retinopathy screening. In: 6th Indian Conference on Computer Vision, Graphics and Image Processing, Bhubaneswar, India, Dec 16-19, 2008. Published in: Sixth Indian Conference on Computer Vision, Graphics & Image Processing, ICVGIP 2008 pp. 520-527.

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Abstract

Diabetic retinopathy is one of the major causes of blindness. However diabetic retinopathy does not usually cause a loss of sight until it has reached an advanced stage. The earliest sign of the disease are microaneurysms (MA) which appear as small red dots on retinal fundus images. Various screening programmes have been established in the UK and other countries to collect and assess images on a regular basis, especially in the diabetic population. A considerable amount of time and money is spent in manually grading these images, a large percentage of which are normal. By automatically identifying the normal images, the manual workload and costs could be reduced greatly while increasing the effectiveness of the screening programmes. A novel method of microaneurysm detection from digital retinal screening images is proposed. It is based on filtering using complex-valued circular-symmetric filters, and an eigen-image, morphological analysis of the candidate regions to reduce the false-positive rate. We detail the image processing algorithms and present results on a typical set of 89 image from a published database. Our method is shown to have a best operating sensitivity of 82.6% at a specificity of 80.2% which makes it viable for screening. We discuss the results in the context of a model of visual search and the ROC curves that it can predict.

Item Type:	Conference Item (Paper)
Subjects:	Q Science > QA Mathematics R Medicine > RC Internal medicine R Medicine > RE Ophthalmology
Divisions:	Faculty of Science > Computer Science
Library of Congress Subject Headings (LCSH):	Diabetic retinopathy, Aneurysms, Retina -- Imaging, Medical screening
Journal or Publication Title:	Sixth Indian Conference on Computer Vision, Graphics & Image Processing, ICVGIP 2008
Publisher:	IEEE Computer Society
ISBN:	978-1-4244-4219-5
Date:	2008
Number of Pages:	8
Page Range:	pp. 520-527
Identification Number:	10.1109/ICVGIP.2008.25
Status:	Not Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Conference Paper Type:	Paper
Title of Event:	6th Indian Conference on Computer Vision, Graphics and Image Processing
Type of Event:	Conference
Location of Event:	Bhubaneswar, India
Date(s) of Event:	Dec 16-19, 2008
URI:	http://wrap.warwick.ac.uk/id/eprint/17478

Data sourced from Thomson Reuters' Web of Knowledge

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