Update app.py

app.py

@@ -59,6 +59,7 @@ def predict_emotion(frame):
     faces = face_detection.detectMultiScale(gray, scaleFactor=1.1,
                                             minNeighbors=5, minSize=(30, 30),
                                             flags=cv2.CASCADE_SCALE_IMAGE)
+    frame_clone = frame.copy()
 
     for (fX, fY, fW, fH) in faces:
         # Extract the ROI of the face from the grayscale image, resize it to a fixed 28x28 pixels, and then prepare