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

Figure 7

Comparison between illumination enhancement methods and their consequent graph-based segmentation results on one of the selected images from DRIVE testing. (a) Green channels of selected image and their 1st-manual images. (b) Local-phase-based enhancement after applying Retinex to green channel. (c) Wavelet-based enhancement method. (d) Multiscale multiorientation BTH. (e) Multiscale BTH.

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