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. 2012 Mar 12;7(3):e32435. doi: 10.1371/journal.pone.0032435

Figure 7. Application of vessel detection to REVIEW database images.

Figure 7

(A–C) Vessels detected in example images from the CLRIS, HRIS and VDIS respectively. (D) Individual diameters found for a vessel in a KPIS image. Note that in the KPIS image, the visible branching vessels are much narrower and dimmer in comparison to the main vessel, so that they occur as unconnected objects in the segmented image. This difference in contrast then allows edges still to be found for the main vessel at these branching locations.