OpenCV保存图像、关键点和描述符到文件

Question

我正在使用SURF/FLANN检测器，希望将图像、点和描述符保存到文件中，以便于将来与第二张图像和其对应的点进行比较。但是当我尝试写入时，出现了以下错误：

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

这是我正在使用的编写代码：

  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），因为如果删除该参数，代码会正常工作。

写入代码上方的代码：

  //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 );

- Colin747

Answer 1

你需要逐一编写它们：

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

- berak