I am currently using the FaceRecognizerand I am not sure about if the feature extraction is done while I train a set of images with its corresponding subjects. I assume it does but I want to make sure because I can't find it anywhere.
I am sure that it does train the classifier since I am saving it in a path which contains a big XML file.
So the question, does http://docs.opencv.org/doc/tutorials/features2d/feature_detection/feature_detection.html happen in http://docs.opencv.org/modules/contrib/doc/facerec/facerec_api.html#facerecognizer-train ?
Thanks in advance