Diou and ciou loss of loss function

This article only introduces Diou and Ciou

1. DIoU Loss The expression of ：

$$\begin{gathered} {\mathcal{L}}_{DIoU}=1-DIoU \\ =1-IoU+\frac{{\rho }^2(b,b^{gt})}{c^2} \end{gathered}$$

Reference article ： Loss function DIoU Loss and CIoU Loss