diff --git a/utils.py b/utils.py
index fc9f457..47e61e7 100644
--- a/utils.py
+++ b/utils.py
@@ -1,4 +1,5 @@
 from astropy.io.fits import open
+import cv2
 import numpy as np
 
 global_i = 0
@@ -202,3 +203,11 @@ def last_consecutive( list_ ):
             else: # if inside the consecutive list and last element, every element is consecutive
                 break
     return i
+def rotate( image , angle ):
+    """
+    rotate the following image by the given angle
+    """
+    height , width = image.shape[ : 2 ]
+    cX , cY        = ( width // 2 , height // 2 )
+    matrix         = cv2.getRotationMatrix2D( ( cX , cY ) , angle , 1 )
+    return cv2.warpAffine( image , matrix , ( width , height ) , flags = cv2.INTER_LINEAR )