Research Article

Retinal Image Matching Using Hierarchical Vascular Features

Figure 2

A schematic diagram of a retinal image showing two blood vessels ( 𝑉 1 and 𝑉 2 ) and the optic disc (a) and the tree model representing the binary tree for vessel 𝑉 1 (b).
749054.fig.002a
(a)
749054.fig.002b
(b)