如何写向量< Dmatch>.到文件存储 [英] How to write vector<Dmatch> to FileStorage
问题描述
我已经能够使用FileStorage成功地将关键点(向量),描述符(垫)和其他内容写入yml文件.但是,在计算完一对图像之间的匹配之后,我无法将匹配写入文件.
I've been able to successfully write keypoints (vector), descriptors (Mat) and other things to yml files using FileStorage. However, after I compute the matches between a pair of images I am unable to write the matches to a file.
我认为这是因为DMatch似乎是具有距离,trainIdx等字段的结构,但是有人能将其写入文件吗?
I am assuming it is because DMatch seems to be a struct that has distance, trainIdx etc. fields, but does anyone have a good way of writing this to a file?
还是我应该只写距离矢量,trainIdx矢量等?
Or should I just write a distance vector, a trainIdx vector etc?
编辑后显示一些代码:
std::vector<cv::DMatch> matches;
for(int i=0;i<numims-1;i++){
for(int j=i+1;j<min(i+10,numims);j++){
matches = MatchImagePair(i,j);
//write the matches
std::string matchfile = matchpath + "matchesij.yml";
cv::FileStorage fs(matchfile, cv::FileStorage::WRITE);
write(fs, "matches", matches);
fs.release();
}
}
matchesij应该包含i和j的数字,但是为了简洁起见,我对其进行了编辑.
matchesij should contain the numbers for i and j but I edited for brevity.
此外,MatchImagePair
类似于:
std::vector<cv::DMatch> Matches::MatchImagePair(int idx1, int idx2){
//matcher type
cv::BFMatcher matcher(cv::NORM_L2);
//given descrs1 and descrs2, match the 2 descriptors
matcher.knnMatch(descrs1, descrs2, matches12, 2);
matcher.knnMatch(descrs2, descrs1, matches21, 2);
//various tests, returns vector<DMatch> given keypts1, keypts2 (for RANSAC)
matches = DoVariousTests(matches12, matches21, keypts1, keypts2);
return matches;
}
推荐答案
您可以重载>>
运算符进行文件存储.
You could overload >>
operator for file storage.
来自的cv :: TermCriteria的工作示例代码这里:
void operator>>(const cv::FileNode &node,
cv::TermCriteria &termCrit) {
node["type"] >> termCrit.type;
node["maxCount"] >> termCrit.maxCount;
node["epsilon"] >> termCrit.epsilon;
}
cv::FileStorage &operator<<(cv::FileStorage &fs,
const cv::TermCriteria &termCrit) {
fs << "{" << "type" << termCrit.type << "maxCount"
<< termCrit.maxCount << "epsilon" << termCrit.epsilon
<< "}";
return fs;
}
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