OpenCV Error: Unspecified error

[tizian...@gmail.com]

Hi Michael,

I create the faces_preprocessed.pkl and mlp.xml 

but running chapter7.py in the phase of testing mode when the face is detected, I receive this error:

"OpenCV Error: Unspecified error (The network has not been trained or loaded) in cv::ml::ANN_MLPImpl::predict, file C:\projects\opencv-python\opencv\modules\ml\src\ann_mlp.cpp, line 245

Traceback (most recent call last):

  File "D:\COLLOQUIO24\py27\cap_7_nuovo\gui.py", line 135, in _on_next_frame

    frame = self._process_frame(cv2.cvtColor(frame, cv2.COLOR_BGR2RGB))

  File "D:/COLLOQUIO24/py27/cap_7_nuovo/chapter7.py", line 189, in _process_frame

    label = self.MLP.predict(np.array(X))[0]

  File "D:\COLLOQUIO24\py27\cap_7_nuovo\classifiers.py", line 269, in predict

    ret, y_hat = self.model.predict(X_test)

cv2.error: C:\projects\opencv-python\opencv\modules\ml\src\ann_mlp.cpp:245: error: (-2) The network has not been trained or loaded in function cv::ml::ANN_MLPImpl::predict"

line 269:   ret, y_hat = self.model.predict(X_test)

I use python 2.7, opencv 3.3.1

Please help me,

Best regards.