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. Author manuscript; available in PMC: 2021 Apr 12.
Published in final edited form as: Biomed Signal Process Control. 2019 Feb 22;51:82–89. doi: 10.1016/j.bspc.2019.01.022

Fig. 6.

Fig. 6.

Illustration of segmentation results of the U-net model on different images. The first column showed three original fundus images, the last five columns from left to right were results of these fundus images, vessel density maps, 4-channel composite images, local disc patches, and their ground truths, respectively.