diff --git a/api/onnx_web/chain/tile.py b/api/onnx_web/chain/tile.py
index 54f47e12..3fcd0af6 100644
--- a/api/onnx_web/chain/tile.py
+++ b/api/onnx_web/chain/tile.py
@@ -232,18 +232,18 @@ def process_tile_spiral(
     **kwargs,
 ) -> Image.Image:
     width, height = kwargs.get("size", source.size if source else None)
-    
+
     tiles: List[Tuple[int, int, Image.Image]] = []
 
     # tile tuples is source, multiply by scale for dest
     counter = 0
     tile_coords = generate_tile_spiral(width, height, tile, overlap=overlap)
-    
+
     if len(tile_coords) == 1:
         single_tile = True
     else:
         single_tile = False
-        
+
     for left, top in tile_coords:
         counter += 1
         logger.info(
@@ -268,26 +268,24 @@ def process_tile_spiral(
         if bottom > height:
             needs_margin = True
             bottom_margin = height - bottom
-        
-        #if no source given, we don't have a source image
+
+        # if no source given, we don't have a source image
         if not source:
             tile_image = None
         elif needs_margin:
-            #in the special case where the image is smaller than the specified tile size, just use the image
+            # in the special case where the image is smaller than the specified tile size, just use the image
             if single_tile:
                 logger.debug("creating and processing single-tile subtile")
                 tile_image = source
-            #otherwise use add histogram noise outside of the image border
+            # otherwise use add histogram noise outside of the image border
             else:
                 logger.debug("tiling and adding margin")
-                base_image = (
-                    source.crop(
-                        (
-                            left + left_margin,
-                            top + top_margin,
-                            right - right_margin,
-                            bottom - bottom_margin,
-                        )
+                base_image = source.crop(
+                    (
+                        left + left_margin,
+                        top + top_margin,
+                        right - right_margin,
+                        bottom - bottom_margin,
                     )
                 )
                 tile_image = noise_source_histogram(base_image, (tile, tile), (0, 0))
@@ -300,7 +298,7 @@ def process_tile_spiral(
             tile_image = image_filter(tile_image, (left, top, tile))
 
         tiles.append((left, top, tile_image))
-    
+
     if single_tile:
         return tile_image
     else:
@@ -354,11 +352,8 @@ def generate_tile_spiral(
     # calculate the start position of the tiling
     span_x = tile + (width_tile_target - 1) * tile_increment
     span_y = tile + (height_tile_target - 1) * tile_increment
-    
-    logger.debug(
-        "tiled image overlap: %s. Span: %s x %s",
-        overlap,span_x,span_y
-    )
+
+    logger.debug("tiled image overlap: %s. Span: %s x %s", overlap, span_x, span_y)
 
     tile_left = (
         width - span_x