Optical nerve segmentation using The Active shape method

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The paper deals with the segmentation procedure for optical nerve localization and the consequent determination of geometrical parameters such as optical nerve area, radius and diameter. An extraction of these geometrical parameters is especially important for clinical practice particularly in the case where retinal lesions are present. On the base of the optical nerve extraction, we are capable of comparing it with area of retinal lesions. Via this approach it is possible to track time evaluation of retinal lesions. The proposed algorithm for segmentation of optical nerve area is performed within two main steps. In the first step, the active contour method is used specially for the localization of the optical nerve. This part of the algorithm generates mathematical model of the optical nerve in binary form. Consequently, on the base of this mathematical model of the optical nerve respective geometrical parameters are worked out for future comparison with retinal lesions. Image preprocessing is an integral part of the segmentation procedure, improving the observability of the optical nerve to ensure as relevant detection of the optical nerve as possible.

Keywords:
Optical nerve, retinopathy, retinal lesions, active contour, image segmentation, extraction of geometrical parameters

Autoři: Jan Kubicek ¹; Juraj Timkovic ^2,3,4,5; Jakub Slonka ¹; Marek Penhaker ¹; Martin Augustynek ¹; Iveta Bryjová ¹
Působiště autorů: VSB–Technical University of Ostrava, FEECS, K 0, Ostrava, Czech Republic ¹; Clinic of Ophthalmology, University Hospital Ostrava, Czech Republic ²; Faculty of Medicine, Masaryk University, Brno, Czech Republic ³; Faculty of Medicine, University of Ostrava, Czech Republic ⁴; University Hospital Ostrava, Czech Republic ⁵
Vyšlo v časopise: Lékař a technika - Clinician and Technology No. 1, 2016, 46, 13-20
Kategorie: Původní práce

Souhrn

Keywords:
Optical nerve, retinopathy, retinal lesions, active contour, image segmentation, extraction of geometrical parameters

Zdroje

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