update alignment logic

now, left eye is the one on the left with respect to the person
instead of observer

deepface/modules/detection.py

@@ -201,8 +201,8 @@ def align_face(
     Align a given image horizantally with respect to their left and right eye locations
     Args:
         img (np.ndarray): pre-loaded image with detected face
-        left_eye (list or tuple): coordinates of left eye with respect to the you
-        right_eye(list or tuple): coordinates of right eye with respect to the you
+        left_eye (list or tuple): coordinates of left eye with respect to the person itself
+        right_eye(list or tuple): coordinates of right eye with respect to the person itself
     Returns:
         img (np.ndarray): aligned facial image
     """
@@ -214,6 +214,6 @@ def align_face(
     if img.shape[0] == 0 or img.shape[1] == 0:
         return img, 0
 
-    angle = float(np.degrees(np.arctan2(right_eye[1] - left_eye[1], right_eye[0] - left_eye[0])))
+    angle = float(np.degrees(np.arctan2(left_eye[1] - right_eye[1], left_eye[0] - right_eye[0])))
     img = np.array(Image.fromarray(img).rotate(angle))
     return img, angle