3d removal of background

https://www.notion.so/qim-dtu/3D-remove-background-function-fac8e64da886429eacd9520bc7be0610?pvs=4

implemented into existing filters framework

qim3d/processing/operations.py

 import qim3d.processing.filters as filters
 
 
-def remove_background(vol, **kwargs):
+def remove_background(vol, size=2, radius=3, background="dark", **kwargs):
     """
     Remove background from a volume using a median filter followed by a tophat filter.
 
     Args:
         vol: The volume to remove background from.
-        **kwargs: Additional keyword arguments for the tophat filter.
+        size: The size of the median filter (default: 2).
+        radius: The radius of the structuring element for the median filter (default: 3).
+        background: The background type ('dark' or 'bright', default: 'dark').
+        **kwargs: Additional keyword arguments for the Median filter.
 
     Returns:
         vol: The volume with background removed.
     """
-    # sets the median filter size to 2 if not specified for removing background artifacts
-    size = kwargs["size"] if "size" in kwargs else 2
-    
+
     # Create a pipeline with a median filter and a tophat filter
     pipeline = filters.Pipeline(
-        filters.Median(size=size),
-        filters.Tophat(**kwargs)
+        filters.Median(size=size, **kwargs),
+        filters.Tophat(radius=radius, background=background),
     )
 
     # Apply the pipeline to the volume
-    return pipeline(vol)
\ No newline at end of file
+    return pipeline(vol)