Fixes metadata dropping

Fixes metadata-dropping bug by implementing the src/convert_to_dst_type round-trip.

Fixes isort error by re-ordering imports in transforms/__init__.py.

Signed-off-by: karllandheer <karllandheer@gmail.com>

Author: karllandheer

monai/transforms/__init__.py

@@ -200,12 +200,12 @@
     RandKSpaceSpikeNoised,
     RandKSpaceSpikeNoiseD,
     RandKSpaceSpikeNoiseDict,
-    RandRicianNoised,
-    RandRicianNoiseD,
-    RandRicianNoiseDict,
     RandNonCentralChiNoised,
     RandNonCentralChiNoiseD,
     RandNonCentralChiNoiseDict,
+    RandRicianNoised,
+    RandRicianNoiseD,
+    RandRicianNoiseDict,
     RandScaleIntensityd,
     RandScaleIntensityD,
     RandScaleIntensityDict,

monai/transforms/intensity/array.py

@@ -252,11 +252,13 @@ def __call__(self, img: NdarrayOrTensor, randomize: bool = True) -> NdarrayOrTen
         """
         Apply the transform to `img`.
         """
+        src = img
         img = convert_to_tensor(img, track_meta=get_track_meta(), dtype=self.dtype)
         if randomize:
             super().randomize(None)
 
         if not self._do_transform:
+            img, *_ = convert_to_dst_type(img, dst=src, dtype=self.dtype)
             return img
 
         if self.channel_wise:
@@ -278,10 +280,18 @@ def __call__(self, img: NdarrayOrTensor, randomize: bool = True) -> NdarrayOrTen
             if not isinstance(std, (int, float)):
                 raise RuntimeError(f"std must be a float or int number, got {type(std)}.")
             img = self._add_noise(img, mean=self.mean, std=std, k=self.degrees_of_freedom)
+
+        img, *_ = convert_to_dst_type(img, dst=src, dtype=self.dtype)
         return img
+<<<<<<< HEAD
+
 
 
+=======
+    
 
+    
+>>>>>>> 83d8ad52 (Fixes metadata dropping)
 class RandRicianNoise(RandomizableTransform):
     """
     Add Rician noise to image.