def _no_match(dm: Tensor) -> Tuple[Tensor, Tensor]:
    """Output empty tensors.

    Returns:
            - Descriptor distance of matching descriptors, shape of :math:`(0, 1)`.
            - Long tensor indexes of matching descriptors in desc1 and desc2, shape of :math:`(0, 2)`.

    """
    dists = torch.empty(0, 1, device=dm.device, dtype=dm.dtype)
    idxs = torch.empty(0, 2, device=dm.device, dtype=torch.long)
    return dists, idxs
Output empty tensors.

    Returns:
            - Descriptor distance of matching descriptors, shape of :math:`(0, 1)`.
            - Long tensor indexes of matching descriptors in desc1 and desc2, shape of :math:`(0, 2)`.

    
kornia/feature/matching.py