Fix MONAILabel-related bugs in dtype conversion and inverse of Spacing (

#6315) Fixes issues relating to dtype and src_affine in inverse of spatial transforms. Issue found to occur when inverse for a given function is required many times, e.g. for iterative updates in interactive segmentation. Related issue #6314 --------- Signed-off-by: Liam Chalcroft <[email protected]>
Project-MONAI · Apr 11, 2023 · 768964b · 768964b
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diff --git a/monai/transforms/spatial/array.py b/monai/transforms/spatial/array.py
@@ -230,6 +230,7 @@ def inverse(self, data: torch.Tensor) -> torch.Tensor:
         with self.trace_transform(False):
             # we can't use `self.__call__` in case a child class calls this inverse.
             out: torch.Tensor = SpatialResample.__call__(self, data, **kw_args)
+        kw_args["src_affine"] = kw_args.get("dst_affine")
         return out
 
 

diff --git a/monai/utils/type_conversion.py b/monai/utils/type_conversion.py
@@ -45,7 +45,7 @@
 
 def get_numpy_dtype_from_string(dtype: str) -> np.dtype:
     """Get a numpy dtype (e.g., `np.float32`) from its string (e.g., `"float32"`)."""
-    return np.empty([], dtype=dtype).dtype
+    return np.empty([], dtype=str(dtype).split(".")[-1]).dtype
 
 
 def get_torch_dtype_from_string(dtype: str) -> torch.dtype: