Unable to train

[Vedant Shah]

runfile('C:/Users/Vedant/Desktop/NEW_EMO/chapter7/train_test_mlp.py', wdir='C:/Users/Vedant/Desktop/NEW_EMO/chapter7')

Loading data from datasets/faces_training.pkl

Loaded 7 training samples

Traceback (most recent call last):

  File "<ipython-input-1-f60b72c5efb4>", line 1, in <module>

    runfile('C:/Users/Vedant/Desktop/NEW_EMO/chapter7/train_test_mlp.py', wdir='C:/Users/Vedant/Desktop/NEW_EMO/chapter7')

  File "C:\Users\Vedant\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 705, in runfile

    execfile(filename, namespace)

  File "C:\Users\Vedant\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 102, in execfile

    exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Users/Vedant/Desktop/NEW_EMO/chapter7/train_test_mlp.py", line 68, in <module>

    main()

  File "C:/Users/Vedant/Desktop/NEW_EMO/chapter7/train_test_mlp.py", line 24, in main

    seed=42)

  File "C:\Users\Vedant\Desktop\NEW_EMO\chapter7\datasets\homebrew.py", line 59, in load_data

    X, V, m = extract_features(samples, num_components=num_components)

  File "C:\Users\Vedant\Desktop\NEW_EMO\chapter7\datasets\homebrew.py", line 139, in extract_features

    m, V = cv2.PCACompute(Xarr)

TypeError: Required argument 'mean' (pos 2) not found

[Michael Beyeler]

Hi Vedant,

Any chance you're running OpenCV 3.1?

In newer version of OpenCV, PCACompute requires a second input argument 'mean'. If you replace

m, V = cv2.PCACompute(Xarr)

with

m, V = cv2.PCACompute(Xarr, mean=None)

the code should work!

Best,

Michael