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How to perform face recognition using java library of Open Cv.

I am using java library of open cv 2.4.7. I don't know how to use its FaceRecognizer class. when I looked at the definition of this class I found this.

Ptr_FaceRecognizer createEigenFaceRecognizer(int num_components = 0, double threshold = DBL_MAX)

Return type 'Ptr_FaceRecognizer' is not supported, skipping the function is there any other method to use this algorithm? As I am very new in the field of open cv so Please suggest the way to perform face recognition by using open cv java library.

How to perform face recognition using java library of Open Cv.

I am using java library of open cv 2.4.7. I don't know how to use its FaceRecognizer class. when I looked at the definition of this class I found this.

Ptr_FaceRecognizer createEigenFaceRecognizer(int num_components = 0, double threshold = DBL_MAX)

Return type 'Ptr_FaceRecognizer' is not supported, skipping the function function.

is there any other method to use this algorithm? As I am very new in the field of open cv so Please suggest the way to perform face recognition by using open cv java library.