Extraction of Blood Vessels in Retinal Images Using Four Different Techniques

<table>Results with modified matched filtering technique (a) original image, (b) image formed using one kernel, (c) image formed using 4 kernels of different lengths and widths, (d) image formed by overlapping the scene in (a) and the blood vessel tree in (c).</table>

Journal of Medical Engineering

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Figure 16

Figure 16: Extraction of Blood Vessels in Retinal Images Using Four Different Techniques 