diff --git a/datasets/raise/extract_noise.py b/datasets/raise/extract_noise.py
index 4cb5824..287ff4c 100755
--- a/datasets/raise/extract_noise.py
+++ b/datasets/raise/extract_noise.py
@@ -136,6 +136,10 @@ if minColor is None or maxColor is None:
     print(f'{minColor=}')
     print(f'{maxColor=}')
 
+def saveNpArray(fileName, npArray):
+    with open(f'{fileName}.npy', 'wb') as f:
+        np.save(f, npArray)
+
 if denoiser == 'mean':
     means = {}
     for color in Color:
@@ -157,6 +161,5 @@ for color in colors:
     for imageFileName in tqdm(imagesFileNames, f'Denoising images for color {color}'):
         treatImage(imageFileName, color = color)
 
-    npArrayFilePath = f'mean_{imagesFolderPathFileName}_{denoiser}_{color}.npy'
-    with open(npArrayFilePath, 'wb') as f:
-        np.save(f, mean)
+    npArrayFilePath = f'mean_{imagesFolderPathFileName}_{denoiser}_{color}'
+    saveNpArray(npArrayFilePath, mean)