Abstract
Optic disc localization is of great diagnostic value related to retinal diseases, such as glaucoma and diabetic retinopathy. However, the detection process is quite challenging because positions of optic discs vary from image to image, and moreover, pathological changes, like hard exudates or neovascularization, may alter optic disc appearance. In this paper, we propose a robust approach to accurately detect the optic disc region and locate the optic disc center in color retinal images. The proposed technique employs a kernelized least-squares classifier to decide the area that contains optic disc. Then connected-component labeling and lumination information are used together to find the convergence of blood vessels, which is thought to be optic disc center. The proposed method has been evaluated over two datasets: the Digital Retinal Images for Vessel Extraction (DRIVE), and the Non-fluorescein Images for Vessel Extraction (NIVE) datasets. Experimental results have shown that our method outperforms existing methods, achieving a competitive accuracy (97.52 %) and efficiency (1.1577s).
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Acknowledgements
The authors would like to thank all reviewers for their helpful suggestions and constructive comments. The corresponding authors of this paper are Bin Sheng (email: shengbin@cs.sjtu.edu.cn) and Qiang Wu (email: wyansh@163.com). The work is supported by the National Natural Science Foundation of China (Nos. 61572316, 61133009), National High-tech R&D Program of China (863 Program) (Grant No. 2015AA015904), the Science and Technology Commission of Shanghai Municipality Program (Nos. 13511505000, 16DZ050110), the Interdisciplinary Program of Shanghai Jiao Tong University (No. 14JCY10), a grant from the Research Grants Council of Hong Kong (Project No.: 28200215), a grant from The Education University of Hong Kong (Project No: FLASS/DRF/ECR-7).
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Wang, R., Zheng, L., Xiong, C. et al. Retinal optic disc localization using convergence tracking of blood vessels. Multimed Tools Appl 76, 23309–23331 (2017). https://doi.org/10.1007/s11042-016-4146-z
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DOI: https://doi.org/10.1007/s11042-016-4146-z