evaluate mae

[geoffzhang]

Hello, I have a question about the method of calculating mae. The below is coded in your code.
"""
+= torch.sum(torch.min(torch.stack((torch.abs(p_gt_deg - p_pred_deg), torch.abs(p_pred_deg + 360 - p_gt_deg), torch.abs(
p_pred_deg - 360 - p_gt_deg), torch.abs(p_pred_deg + 180 - p_gt_deg), torch.abs(p_pred_deg - 180 - p_gt_deg))), 0)[0])
yaw_error += torch.sum(torch.min(torch.stack((torch.abs(y_gt_deg - y_pred_deg), torch.abs(y_pred_deg + 360 - y_gt_deg), torch.abs(
y_pred_deg - 360 - y_gt_deg), torch.abs(y_pred_deg + 180 - y_gt_deg), torch.abs(y_pred_deg - 180 - y_gt_deg))), 0)[0])
roll_error += torch.sum(torch.min(torch.stack((torch.abs(r_gt_deg - r_pred_deg), torch.abs(r_pred_deg + 360 - r_gt_deg), torch.abs(
r_pred_deg - 360 - r_gt_deg), torch.abs(r_pred_deg + 180 - r_gt_deg), torch.abs(r_pred_deg - 180 - r_gt_deg))), 0)[0])
"""
I don't understand why to use " torch.abs(p_pred_deg + 180 - p_gt_deg), torch.abs(p_pred_deg - 180 - p_gt_deg)".
For example, if p_pred_deg=10 and p_gt_deg=170, the error should be 160. But if I calculate it use your method, the error is 20.

[geoffzhang]

@thohemp

[awarebayes]

#2 (comment)

[thohemp]

Thanks @geoffzhang @awarebayes
This seems indeed odd, I will investigate this.