cv::matchTemplate(im1, im2, result, CV_TM_CCOEFF_NORMED);
feature.push_back(result.at<double>(0, 0));
cv::matchTemplate(im1, im2, result, CV_TM_CCORR_NORMED);
cv::matchTemplate(im1, im2, result, CV_TM_CCOEFF_NORMED);
feature.push_back(result.at<double>(0, 0));
cv::matchTemplate(im1, im2, result, CV_TM_CCORR_NORMED);