XML文件的写入和读取

#include<opencv2/opencv.hpp>
#include<iostream>

using namespace std;
using namespace cv;

int main() {
    //初始化
    FileStorage fs("test.xml", FileStorage::WRITE);

    //开始文件写入
    fs << "frameCount" << 5;
    time_t rawtime;
    time(&rawtime);
    fs << "calibrationDate" << asctime(localtime(&rawtime));
    Mat cameraMatrix = (Mat_<double>(3, 3) << 1000, 0, 320, 0, 1000, 240, 0, 0, 1);
    Mat distCoeffs = (Mat_<double>(5, 1) << 0.1, 0.01, -0.001, 0, 0);
    fs << "cameraMatrix" << cameraMatrix << "distCoeffs" << distCoeffs;
    fs << "features" << "[";
    for (int i = 0; i < 3; i++) {
        int x = rand() % 640;
        int y = rand() % 480;
        uchar lbp = rand() % 256;

        fs << "{:" << "x" << x << "y" << y << "lbp" << "[:";
        for (int j = 0; j < 8; j++) 
            fs << ((lbp >> j) & 1);
        fs << "]" << "}";
    }
    fs << "]";
    fs.release();

    printf("文件读写完毕，请在工程目录下查看生成的文件~");
    getchar();

    return 0;
}

#include<opencv2/opencv.hpp>
#include<iostream>

using namespace std;
using namespace cv;

int main() {
    //改变console 字体颜色
    system("color 6F");

    //初始化
    FileStorage fs2("test.xml", FileStorage::READ);

    //第一种方法，对FileNode操作
    int  frameCount = (int)fs2["frameCount"];
    string date;

    //第二种方法，使用FileNode运算符>>
    fs2["calibrationDate"] >> date;

    Mat cameraMatrix2, distCoeffs2;
    fs2["cameraMatrix"] >> cameraMatrix2;

    fs2["distCoeffs"] >> distCoeffs2;

    cout << "frameCount:" << frameCount << endl
        << "calibration date:" << date << endl
        << "camera matrix:" << cameraMatrix2 << endl
        << "distortion coeffs:" << distCoeffs2 << endl;

    FileNode features = fs2["features"];
    FileNodeIterator it = features.begin(), it_end = features.end();
    int idx = 0;
    vector<uchar> lbpval;

    //使用FileNodeIterator遍历序列
    for (; it != it_end; ++it, idx++) {
        cout << "feature #" << idx << ":";
        cout << "x+" << (int)(*it)["x"] << ", y=" << (int)(*it)["y"] << ", lbp: (";

        //我们也可以使用filenode>>vector操作符来很容易地读数值阵列
        (*it)["lpb"] >> lbpval;
        for (int i = 0; i < (int)lbpval.size(); i++)
            cout << " " << (int)lbpval[i];
        cout << ")" << endl;
    }

    fs2.release();
    
    //程序结束，输出一些帮助文字
    printf("
文件读取完毕！");
    getchar();

    return 0;
}