Automatically export boolean masks as 0-255 black/white

model_server/accessors.py

@@ -190,7 +190,7 @@ def write_accessor_data_to_file(fpath: Path, accessor: GenericImageDataAccessor,
         )
         if accessor.is_mask():
             if accessor.dtype == 'bool':
-                data = zcyx * 255
+                data = (zcyx * 255).astype('uint8')
             else:
                 data = zcyx.astype('uint8')
             tifffile.imwrite(fpath, data, imagej=True)