DSpace
 

Federal University of Technology, Minna Institutional Repository >
School of Information and Communication Technology >
Telecommunication Engineering >

Please use this identifier to cite or link to this item: http://http://dspace.futminna.edu.ng/jspui/handle/1/179

Title: A New Method of Correcting Uneven Illumination Problem in Fundus Image
Authors: Aibinu, A. M
Iqbal, M.I
Nilsson, M.
Salami, M.J.E
Keywords: Fundus Image
Issue Date: 2007
Abstract: Recent advancements in signal and image processing have reduced the time of diagnoses, effort and pressure on the screeners by providing auto diagnostic tools for different diseases. The success rate of these tools greatly depend on the quality of acquired images. Bad image quality can significantly reduce the specificity and the sensitivity which in turn forces screeners back to their tedious job of manual diagnoses. In acquired fundus images, some areas appear to be brighter than the other, that is areas close to the center of the image are always well illuminated, hence appear very bright while areas far from the center are poorly illuminated hence appears to be very dark. Several techniques including the simple thresholding, Naka Rushton (NR) filtering technique and histogram equalization (HE) method have been suggested by various researchers to overcome this problem. However, each of these methods has limitations at their own and hence the need to develop a more robust technique that will provide better performance with greater flexibility. A new method of compensating uneven (irregular) illumination in fundus images termed global-local adaptive histogram equalization using partially-overlapped windows (GLAPOW) is proposed in this paper. The developed algorithm has been tested and the results obtained show superior performance when compared to other known techniques for uneven illumination correction.
URI: http://http://dspace.futminna.edu.ng/jspui/handle/1/179
Appears in Collections:Telecommunication Engineering

Files in This Item:

File Description SizeFormat
A New Method of Correcting Uneven Illumination Problem in Fundus Image.pdf893.4 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0!
Copyright © - 2013 Federal University Of Technology, Minna Institutional Repository - Contact Us

Powered by Dspace