Work place: Siddaganga Institute of Technology, Tumkur, 572120, India
E-mail: nijagunarya@gmail.com
Website:
Research Interests: Mathematics of Computing, Computing Platform, Parallel Computing, Concurrent Computing, Ubiquitous Computing
Biography
Y. S. Nijagunarya was born in Mysore, India on 26th September 1960. He was graduated from Bangalore University, India. He received his Masters in Industrial Electronics from Mysore University, India. He was awarded with a Ph.D. degree from Mysore University. Currently, he is working as a Professor at Siddaganga Institute of Technology, Tumkur, India. He has a vast teaching experience of 29 years. His area of research is soft computing techniques.
By Dharmanna Lamani T. C. Manjunath Mahesh M Y S Nijagunaraya
DOI: https://doi.org/10.5815/ijigsp.2015.07.02, Pub. Date: 8 Jun. 2015
Early identification of diabetic retinopathy is highly beneficial for preventing the progression of disease. Appearance of blood vessels & retinal surface is a good ophthalmological sign of diabetic retinopathy in fundus images. In this paper, a novel method involving two approaches has been proposed for diagnosis of diabetic retinopathy. The first approach deals with estimation of fractal dimension of lesions by applying power spectral fractal dimension algorithms. For healthy retinas, fractal dimensions are found to be in the range of 2.00 to 2.069, whereas for retinas with diabetic retinopathy, fractal dimensions exceed upper limit. In the second approach, Gray Level Co-occurrence Matrix method is used to analyze the extracted regions from healthy and diabetes affected fundus retinal images. Texture features such as entropy & contrast are computed for healthy and unhealthy regions. These texture features are compared with fractal dimensions. The authors observed positive correlation between entropy and fractal dimensions, whereas negative correlation with contrast and fractal dimensions. Detailed implementations of the proposed work are presented.
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