An Automatic Cognitive Graph-Based Segmentation for Detection of Blood Vessels in Retinal Images

Figure 6

Demonstrative comparison of correction methods on one of the DRIVE testing images. The first row shows the results of inhomogeneity correction method and its consequence final segmentation in the second row. (a) RGB image and 1st manual. (b) Green channel without correction. (c) CLAHE correction. (d) Retinex correction. (e) Difference between green and median blurring of green channels. (f) Difference between green and Gaussian blurring of green channel.

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