Problem with call of function bm3dDenoising() and xphoto ...

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Hello,

I would like to create small opencv script woth BM3D denoising. I can't call propely this fucntion in opencv

bm3dDenoising() ? Could anyone help me please ? About include and Namespace ?

#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
#include<opencv2/photo/photo.hpp>
#include<math.h>
using namespace cv::xphoto;
using namespace std;

    int main()
{
 //Load an Image
 Mat img = imread("C:\\image2.jpg", CV_LOAD_IMAGE_COLOR);
 namedWindow("Image", CV_WINDOW_AUTOSIZE);
 imshow("Image", img);

 //Blur Effect
 GaussianBlur(img, img, cv::Size(3, 3), 0);
 cv::xphoto::bm3dDenoising(img, img);  // ????
 namedWindow("Output", CV_WINDOW_AUTOSIZE);
 imshow("Output", img);
 //Wait Key press
 cvWaitKey(0);
 //destroy
 cvDestroyWindow("Image");
 cvDestroyWindow("BlurEffect");
 return 0;
}