How do you pass the labels parameter as a (Mat) to facerecognizer from OpenCV in Java?

Question

So I'm trying to implement the Face Recognizer methods from the contributed section of the OpenCV API on Android. The API documentation can be found here: http://docs.opencv.org/modules/contrib/doc/facerec/facerec_api.html

The problem I'm having is that in the Java API, the train method is:

public  void train(List<Mat> src, Mat labels){
    Mat src_mat = Converters.vector_Mat_to_Mat(src);
    train_0(nativeObj, src_mat.nativeObj, labels.nativeObj);

    return;
}

I cannot for the life of me, get the call to work because of the (Mat) labels input. In the c++ documentation it calls for a vector of integers, so I tried passing a 1D Mat, but no luck. Anyone had this problem or have some insight on how to tackle this?

Answer 1

oh dear, looks like you haven't found out, that you cannot create a FaceRecognizer in the opencv java api as of now ?

it's a known bug, you would need some jni skills to build the missing factory functionality.

unless you solve that, don't worry about the labels ...