Update and save face recognition model

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Face recognition model can be created , saved and reloaded. ( http://docs.opencv.org/modules/contri...)

Can this model be updated with new faces?

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herohuyongtao On

The face recognition model can be updated by using FaceRecognizer::update(), but only for the Local Binary Patterns Histograms (LBPH) recognizer.

This method updates a (probably trained) FaceRecognizer, but only if the algorithm supports it. The Local Binary Patterns Histograms (LBPH) recognizer (see createLBPHFaceRecognizer()) can be updated. For the Eigenfaces and Fisherfaces method, this is algorithmically not possible and you have to re-estimate the model with FaceRecognizer::train(). In any case, a call to train empties the existing model and learns a new model, while update does not delete any model data.