Update loss.py #93
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Update loss.py #93
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fix bugs when pos_inds.numel()=0, reg_targets_flatten and anchors_flatten is empty tensor. It will be wrong for some tensor operator in self.compute_centerness_targets function. For example the tensor operator "left_right.min(dim=-1)" the error info is " RuntimeError: cannot perform reduction function min on tensor with no elements because the operation does not have an identity"
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fix bugs
when pos_inds.numel()=0, reg_targets_flatten and anchors_flatten is empty tensor. It will be wrong for some tensor operator in self.compute_centerness_targets function. For example the tensor operator "left_right.min(dim=-1)" the error info is " RuntimeError: cannot perform reduction function min on tensor with no elements because the operation does not have an identity"