OpenCV将图像,关键点和描述符保存到文件中

时间:2014-01-28 12:58:32

标签: c++ opencv image-processing surf flann

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,然后指出我得到了以下内容我尝试写的错误:

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

这是我用来写的代码:

  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),因为它可以在删除此arg时正常工作。

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 );

2 个答案:

答案 0 :(得分:6)

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();

答案 1 :(得分:-1)

我们必须逐一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();