Table 2.

The formulation of evaluation metrics.

Dice similarity coefficient (DSC)	$D\left(X,Y\right)$ = 2$\frac{\left|X\right|\cap \left|Y\right|}{\left|X\right|+\left|Y\right|}$
Jaccard Index (JI)	$JI\left(X,Y\right)$ = $\frac{DSC}{2-DSC}$
Hausdorff distance (HD)	$HD=max\times \left\{\begin{array}{c}\underset{x\in X}{max} \underset{y\in Y}{min} D\left\{X,Y\right\},\\ \underset{y\in Y}{max} \underset{x\in X}{min} D\left\{X,Y\right\}\end{array}\right\}$
Mean squared error (MSE)	MSE = $\frac{1}{RC}$ ${{\displaystyle \sum }}_{i=1}^R{{\displaystyle \sum }}_{j=1}^C{\left(X-Y\right)}^2$