Matlab code for optic disk detection in Diabetic retinopathy

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With the development of digital image processing, analysis and modeling techniques, automatic retinal image analysis is emerging as an important screening tool for early detection of ophthalmologic disorders such as diabetic retinopathy and glaucoma.

In this paper, a robust method for optic disc detection and extraction of the optic disc boundary is proposed to help in the development of computer-assisted diagnosis and treatment of such ophthalmic disease.

The proposed method is based on morphological operations, smoothing filters, and the segmenation technique. Internal and external markers are used to first modify the gradient magnitude image and then the watershed transformation is applied on this modified gradient magnitude image for boundary extraction.

This method has shown significant improvement over existing methods in terms of detection and boundary extraction of the optic disc.

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