def __init__(self) -> None:
        """Initialize Gaussian model with empty buffers."""
        super().__init__()
        self.register_buffer("mean_vec", torch.Tensor())
        self.register_buffer("u_mat", torch.Tensor())
        self.register_buffer("sigma_mat", torch.Tensor())

        self.mean_vec: torch.Tensor
        self.u_mat: torch.Tensor
        self.sigma_mat: torch.Tensor
Initialize Gaussian model with empty buffers.
src/anomalib/models/image/dfm/torch_model.py