bbox_overlaps error

[zhaozhen2333]

pred_bbox = torch.tensor([[0.3491, 1.1030, 5.3415, -0.9908]])
ego_bbox = torch.tensor([[-0.9, 1.0, 2.1, -1.0]])
overlaps = bbox_overlaps(pred_bbox, ego_bbox)

I got the result (tensor([[0]]))

[zhaozhen2333]

from mmdet.structures.bbox import bbox_overlaps