Figure 8.

Illustration of a vessel extraction technique by EEED, (a) original retinal image, (b) Gaussian blur of the image in (a) with σ = 24, (c) minimum of the images in (a) and (b), (d) Gaussian blur of the image in (c) width σ = 1, (e) result of LOG filter convolution of size (9, 9) with image in (d), (f) optimum threshold of the image in (e), (g) application of noise deletion filter of window size (8, 8) to image in (f), (h) application of noise deletion filter of window size (16, 16) to image in (g).