OpenCV将图像，关键点和描述符保存到文件中

Question

我正在使用SURF / FLANN探测器，我正在寻找将图像，点，描述符保存到文件中，这样我就可以比较这个图像，然后将它指向第二个图像并指向我但是当我得到以下错误时试着写：

In file included from detectFlannPoints.cpp:4:0:
/usr/local/include/opencv2/features2d/features2d.hpp:112:17: note: void cv::write(cv::FileStorage&, const string&, const std::vector<cv::KeyPoint>&)
/usr/local/include/opencv2/features2d/features2d.hpp:112:17: note:   candidate expects 3 arguments, 4 provided

这是我用来编写的代码：

  FileStorage fs("Keypoints.yml", FileStorage::WRITE);
  write(fs, "templateImageOne", keypoints_1, tempDescriptors_1);
  fs.release();

我不确定在哪里可以指定额外的参数（ tempDescriptors_1 ），因为它可以正常删除这个arg。

代码立即高于写代码：

  //Detect the keypoints using SURF Detector
  int minHessian = 400;
  SurfFeatureDetector detector( minHessian );
  std::vector<KeyPoint> keypoints_1;
  detector.detect( img_1, keypoints_1 );
  //-- Step 2: Calculate descriptors (feature vectors)
  SurfDescriptorExtractor extractor;
  Mat tempDescriptors_1;
  extractor.compute( img_1, keypoints_1, tempDescriptors_1 );
 //-- Draw keypoints
  Mat img_keypoints_1;
  drawKeypoints( img_1, keypoints_1, img_keypoints_1, Scalar::all(-1), DrawMatchesFlags::DEFAULT );

Answer 1

你必须一次写一个：

FileStorage fs("Keypoints.yml", FileStorage::WRITE);
write(fs, "keypoints_1", keypoints_1);
write(fs, "descriptors_1", tempDescriptors_1);
...
fs.release();

Answer 2

我们必须逐个编写关键点和描述符

FileStorage fs("Keypoints.yml", FileStorage::WRITE);
write(fs, "templateImageOne_Keypoint", keypoints_1);
write(fs, "templateImageOne_descriptor", tempDescriptors_1);
fs.release();