computeDescriptors  722 modules/cudafeatures2d/src/orb.cpp     void ORB_Impl::computeDescriptors(OutputArray _descriptors)
computeDescriptors   23 samples/cpp/tutorial_code/calib3d/real_time_pose_estimation/src/RobustMatcher.cpp void RobustMatcher::computeDescriptors( const cv::Mat& image, std::vector<cv::KeyPoint>& keypoints, cv::Mat& descriptors)