Update app.py

app.py

@@ -16,11 +16,11 @@ def filter_img(input_img,filter_type):
     filtered_img = np.zeros_like(img)
     
     if filter_type == 'Vintage':
-        filtered_img = cv2.transform(img, np.matrix([[0.272, 0.534, 0.131],
-                                    [0.349, 0.686, 0.168],
-                                    [0.393, 0.769, 0.189]])
-        filtered_img[np.where(img > 255)] = 255 # normalizing values greater than 255 to 255
-        filtered_img = np.array(filtered_img, dtype=np.uint8) # converting back to int
+        sepia_filter = np.array([[0.393, 0.769, 0.189],
+                         [0.349, 0.686, 0.168],
+                         [0.272, 0.534, 0.131]])
+
+        filtered_img = np.dot(img, sepia_filter.T).astype(np.uint8)
     elif filter_type == 'Gray-sharp':
         img = cv2.cvtColor(img,cv2.COLOR_RGB2GRAY)
         filtered_img = cv2.addWeighted(img,4, cv2.blur(img,(128,128)),-4,128)