Title: Modelling and time evaluation of optical disc and retinal lesions

Authors: Jan Kubicek; Juraj Timkovic; Marek Penhaker; Martin Augustynek; Jakub Slonka; Veronika Kovarova; Radovan Hudak; Martin Cerny

Addresses: VSB-Technical University of Ostrava, FEECS, K450 17. Listopadu 15, 708 33, Ostrava-Poruba, Czech Republic ' Clinic of Ophthalmology, University Hospital Ostrava, Czech Republic ' VSB-Technical University of Ostrava, FEECS, K450 17, Listopadu 15, 708 33, Ostrava-Poruba, Czech Republic ' VSB-Technical University of Ostrava, FEECS, K450 17, Listopadu 15, 708 33, Ostrava-Poruba, Czech Republic ' VSB-Technical University of Ostrava, FEECS, K450 17, Listopadu 15, 708 33, Ostrava-Poruba, Czech Republic ' VSB-Technical University of Ostrava, FEECS, K450 17, Listopadu 15, 708 33, Ostrava-Poruba, Czech Republic ' Faculty of Mechanical Engineering, Institute of Security and Biomedical Engineering, Technical University of Kosice, Kosice, Slovakia ' VSB-Technical University of Ostrava, FEECS, K450 17, Listopadu 15, 708 33, Ostrava-Poruba, Czech Republic

Abstract: In the clinical ophthalmology, the retinal image analysis is a routine procedure with a target of the time considering the retinal lesions over the time. Unfortunately, there is an absence of the clinical software instruments providing a precise tracking the retinal lesions from the image records. Thus, the retinal image analysis is carried out by skilled physicians, but without any objective software feedback. We aim to propose a procedure having ambitions to an automatic and autonomous extraction of the retinal lesion from the retinal images, and its time evaluation. The retinal lesions are considered on a base of the optical disc which is simultaneously segmented from the retinal images. It is clinically supposed that the optical disc has stable geometrical features over the time contrarily geometrical features of the retinal lesions are timedeveloped. The proposed methodology for a time modelling of the retinal lesions comprises three essential procedures. The optical disc and the retinal lesions segmentation on a base of the time evolving curves ensure indication areas of these retinal objects. Consequently, the binary classification is used with a target of an extraction of a respective model of the optical disc and the retinal lesions.

Keywords: retinal lesions; optical disc; modelling; active snake model; binarisation; retinal image; RetCam 3; fundus camera; image processing; image segmentation; geometrical features; initial contour.

DOI: 10.1504/IJDET.2018.092634

International Journal of Digital Enterprise Technology, 2018 Vol.1 No.1/2, pp.5 - 36

Received: 28 Mar 2017
Accepted: 04 Oct 2017
Published online: 26 Jun 2018 *