Note: `FaceRecognizerBase` class is introduced in OpenCV 2.4 to preserve `FaceRecognize` binary backward compatibility. It contains changes that should move to `FaceRecognize` in master/3.0 branch.
The current `FaceRecognizerBase` class declaration is:
```
class FaceRecognizerBase : public FaceRecognizer
{
...
};
```