Update app.py

app.py

@@ -80,6 +80,7 @@ def extract_clip_features(image_path, model, preprocess):
 
 # Main function
 def compare_images(image1, image2, method):
+    similarity = None
     start_time = time.time()
     if method == 'pHash':
         img1 = Image.open(image1)