OpenCV將圖像，關鍵點和描述符保存到文件中

Question

我正在使用SURF / FLANN探測器，我正在尋找將圖像，點，描述符保存到文件中，這樣我就可以比較這個圖像，然后將它指向第二個圖像並指向我但是當我得到以下錯誤時試着寫：

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

這是我用來編寫的代碼：

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

我不確定在哪里可以指定額外的參數（ tempDescriptors_1 ），因為它可以正常刪除這個arg。

代碼立即高於寫代碼：

  //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

你必須一次寫一個：

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

Answer 2

我們必須逐個編寫關鍵點和描述符

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