[英]OpenCV saving image, keypoints and descriptors to file
I'm using SURF/FLANN detector and I'm looking to save the image, points, descriptors to a file so I can then compare this image and it's points to a second image and points however I'm getting the following error when I try to write: 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
This is the code I'm using to write: 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();
I'm not sure where I can specify the extra argument ( tempDescriptors_1
) as it works fine with this arg removed. 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。
Code immediatly above the write code: 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 );
you have to write them one at a time: 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();
We have to write the keypoints and descriptors one by one 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();
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