#include <iostream>

#include <vector>

#include <opencv2/core/core.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/ocl/ocl.hpp>

#include <opencv2/nonfree/ocl.hpp>

using namespace std;

using namespace cv;

using namespace cv::ocl;

const char * img_fname = "image_1409187896.603828323.bmp";

int main(int argc, char **argv)

{

  Mat image = imread(img_fname, CV_LOAD_IMAGE_GRAYSCALE);

  if(!image.data) {

    cerr << "Could not open image " << img_fname << endl;

    return -1;

  }

  oclMat image_ocl(image);

  ::cv::ocl::SURF_OCL surf_ocl(800.0, 4, 2, false);

  oclMat mask_ocl, descriptors_ocl;

  Mat descriptors;

  vector<KeyPoint> key_points;

  surf_ocl(image_ocl, mask_ocl, key_points, descriptors_ocl);

  descriptors = (Mat)descriptors_ocl;

  cout << "Got " << descriptors.rows << " " << descriptors.cols << "-dim descriptors" << endl;

  return 0;

}