Extraction and 3d Reconstruction of Retinal Blood Vessels from Single Fundus Image

3D modelling has gained lot of importance in the field of medical Image analysis. 3D models give the depth information of the object which is very useful in visualization. The analysis of the blood vessels in the retinal image is helpful for identifying the different diseases such as stages of diabetic retinopathy, glaucoma etc.3D retinal blood vessels would be helpful in explaining to patients about the progression of a disease in the eye and for diagnostic records. This paper presents a simple algorithm to model the 3D structure of blood vessel, which is an extension of the previous work [1]. In this work 3D model of blood vessel is obtained by using gradient method, unsharp masking and shape from shading. Simulation results on a set of retinal images verify the effectiveness of the proposed method. Keywords— Shape from Shading (SFS), Gradient, Fundus image, 3D reconstruction, unsharp masking