Table 2. Comparison results of U-Net and the proposed model on optic disk data.

Model	OD_SEN	OD_SPE	OD_E
U-Net	0.9887	0.9943	0.1179
U-Net+CBAM+residual	0.9974	0.9967	0.1075
RecurrentUnits (Gao et al., 2020)	0.9374	---	---
GAN (Son, Park & Jung, 2019)	0.9747	0.9977	---
CE-Net (Gu et al., 2019)	0.9759	0.9990	---