Table 8.

Performance comparison of CHC-Otsu algorithm against leading methods on 2594 images from ISIC 2018 dataset.

Methods	Accuracy	Sensitivity	Specificity	Dice
SDI+ [9] a	0.87	0.87	0.89	0.75
SPCA [36] b	0.84	0.59	0.92	0.62
[34] b	0.93	0.87	0.97	0.87
RU-Net [31] b	0.88	0.79	0.93	0.68
R2U-Net [31] b	0.90	0.73	0.97	0.69
Attention ResU-Net [35] b	0.92	0.84	0.95	0.85
R2AU-Net [35] b	0.93	0.82	0.97	0.87
CHC-Otsu a	0.92	0.78	0.99	0.81

^a unsupervised method; ^b supervised method.