Table 5.

Comparison of bleeding segmentation approaches on the WCE dataset.

Author	Method	Accuracy
Figueiredo et al. [44]	Computerized method	86.9%
Liangpunsakul et al. [45]	Suspected blood indicator tool	73%
Sainju et al. [46]	Statistical features and region growing	87%
Our proposed method	Attention residual U-net	99.16%