使用openCV从xml文件读取和显示矩阵 [英] Reading and displaying matrix from xml file with openCV
问题描述
我想使用openCV从xml文件中读取和显示一个矩阵。 XML文件如下所示:
I'm trying to read and display a matrix from within an xml file, using openCV. The XML file looks like this:
<?xml version="1.0"?>
<opencv_storage>
<frame_00000>
<pose type_id="opencv-matrix">
<rows>0</rows>
<cols>0</cols>
<dt>u</dt>
<data></data></pose>
<expertCode>3</expertCode>
<autoCode>-1</autoCode></frame_00000>
<frame_00001>
<pose type_id="opencv-matrix">
<rows>0</rows>
<cols>0</cols>
<dt>u</dt>
<data></data></pose>
<expertCode>0</expertCode>
<autoCode>-1</autoCode></frame_00001>
<frame_00002>
<pose type_id="opencv-matrix">
<rows>6</rows>
<cols>1</cols>
<dt>d</dt>
<data>
9.6603986167822176e-02 2.7534827334102827e-02
-7.9839974858475181e-03 2.9772357539313782e+02
2.6446663460538508e+02 1.5645098067258549e+00</data></pose>
<expertCode>0</expertCode>
<autoCode>0</autoCode></frame_00002>
etc...
我已经设法打开文件,让它在编译和运行时打印帧数据。这是我有的代码:
I have managed to open the file, but I can't get it to print the frame data when it is compiled and run. This is the code I have:
#include "opencv2/opencv.hpp"
#include <fstream>
using namespace cv;
using namespace std;
int main()
{
std::cout<< endl << "Reading:" << endl;
FileStorage fs;
fs.open("output.xml", FileStorage::READ);
if (fs.isOpened())
{
cout<<"File is opened\n";
}
Mat pose2;
fs["pose"] >> pose2;
std::cout<< pose2;
fs.release();
return (0);
}
问题是在fs.release()之前的最后一个代码块。无论我尝试什么,它都不显示数据。
The problem is with the last block of code before fs.release(). No matter what I try, it doesn't display the data.
我想让它显示xml文件中的所有帧数据。我已经使用OpenCV教程和参考手册作为指南,但它只是没有帮助。
I want it to display all the frame data from the xml file. I've been using the OpenCV tutorials and reference manual as a guide, but it's just not helping.
任何指针都会赞赏,即使它只是一个基本的轮廓。
Any pointers would be appreciated, even if it's just a basic outline of the commands I should be using.
推荐答案
FileNode n = fs.root();
for (FileNodeIterator current = n.begin(); current != n.end(); current++) {
FileNode item = *current;
Mat v;
item["pose"] >> v;
cout << v << endl;
}
:)
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