eur op eanexhibitionofcreati vityandinnovation - Europe Direct Iasi

EUROINVENT 2013
32.4.
Title EN Retinal-DetDO – Optic Disk detection in retinal images
Florin Rotaru, Bejinariu Silviu-Ioan, Cristina Diana Niţă,
Authors
Ramona Luca
Institute of Computer Science, Romanian Academy Iasi
Institution
Branch
Patent no. ORDA Registration no. 2986 / 01.04.2013
The software is an improved optic disc localisation method
implementation for color retinal images. Tests were done on
RGB retinal images of 720x576 and 2592x1728 resolutions.
First, using a voting procedure, an approximate optic disc
area is identified. Then on a window centered on this area an
opening is applied using as structuring element a line of 12
orientations. Choosing for each pixel in this area the
minimum intensity pixel of twelve results the blood vessels
are erased. In the next step a Canny filtering followed by
binarization to obtain the disc edges is performed. Using a
Hough procedure the circle with the best fitting score is
detected. The Canny and Hough procedures are iteratively
Description applied, using a variable threshold for Canny approach, until
EN a desirable fitting score is obtained. While Canny filtering
was performed using the OpenCV function for Hough
transform we implemented our own method. We opted for
our own Hough transform implementation in order to get
more control on the distribution of the fitting points. This
way some configurations can be rejected even there are
generated by an acceptable number of fitting points if the
points are not equally distributed around circle centre.
Class no.
The proposed method is implemented as a Windows
application, in C++ using Microsoft Visual Studio. For
image manipulation and some processing functions, the
OpenCV library is used.
10. Information Technology and Communication
NATIONAL
201