some questions about chapter 7

[赵东城]

Hello Michael
Is this code suitable for linux , i just run the code in ubuntu and ,the test button can not be clicked, it is very strange. It just says that there should be at least one input

thank you very much

[Michael Beyeler]

Hi,

You need to first record a training set, before the test button can be clicked. There is a specific workflow to the project, which is explained in my book in Chapter 7 and in the source code of "chapter7/chapter7.py":

	"""OpenCV with Python Blueprints Chapter 7: Learning to Recognize Emotion in Faces
	An app that combines both face detection and face recognition, with a
	focus on recognizing emotional expressions in the detected faces.
	The process flow is as follows:
	* Run the GUI in Training Mode to assemble a training set. Upon exiting
	the app will dump all assembled training samples to a pickle file
	"datasets/faces_training.pkl".
	* Run the script train_test_mlp.py to train a MLP classifier on the
	dataset. This file will store the parameters of the trained MLP in
	a file "params/mlp.xml" and dump the preprocessed dataset to a
	pickle file "datasets/faces_preprocessed.pkl".
	* Run the GUI in Testing Mode to apply the pre-trained MLP classifier
	to the live stream of the webcam.
	"""

Let me know if you have more questions.

Best,

Michael

[赵东城]

yeah I have solved this question because that the training data is not enough，thanks for your answers very much

在 2016年5月13日星期五 UTC+8下午12:07:48，赵东城写道：

[Michael Beyeler]

You're welcome. Let me know if you run into any other issues.