如何使用opencv的c++接口来读取、写结构体数组到yml文件中

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  • Post category:其他


引用地址


http://blog.csdn.net/jia_zhengshen/article/details/12910299

参考地址:


http://docs.opencv.org/modules/core/doc/xml_yaml_persistence.html#filestorage-writeraw

优先选用yml而不是xml

#include<opencv2\opencv.hpp>
#include<time.h>
using namespace std;
using namespace cv;
typedef struct _t{
    int x;
    int y;   //不支持size_t,unsigned等无符号类型数值的存储,目前只支持int,float,double,string类型(具体解释在代码后)
    double c;
}t;
#include "opencv2/opencv.hpp"
#include <time.h>

using namespace cv;

int main(int, char** argv)
{
    FileStorage fs("test.xml", FileStorage::WRITE);

    fs << "frameCount" << 5;
    time_t rawtime; time(&rawtime);

    fs << "features" << "[";//结构数组开始的标志
    for( int i = 0; i < 3; i++ )
    {
        int x = rand() % 640;//使用随机数产生数值
        int y = rand() % 480;
        double c = rand()*0.3;
        fs<<"{:";//一个结构体开始的标志,yml才有:,xml自动忽略
        fs<<"x"<<x;
        fs<<"y"<<y;
        fs<<"c"<<c;
        fs<<"}";//结构体结束的标志,自动换行
    }
    fs << "]";//结构体数组结束的标志。
    fs.release();

    //读取xml文件。
    cv::FileStorage fs2("test.xml",FileStorage::READ);
    FileNode features = fs2["features"];//读取结构体数组
    FileNodeIterator fni = features.begin();
    FileNodeIterator fniEnd = features.end();
    for(;fni != fniEnd;fni++)//遍历
    {
        t myT ;
        myT.x = (int )(*fni)["x"];
        myT.y = (int )(*fni)["y"];
        myT.c = (double)(*fni)["c"];
        cout<<"x"<<myT.x<<"  "<<"y"<<myT.y<<"   c"<<myT.c<<endl;
    }
    return 0;
}

结构体数值支持类型解释:

CV_EXPORTS_W void write( FileStorage& fs, const string& name, int value );
CV_EXPORTS_W void write( FileStorage& fs, const string& name, float value );
CV_EXPORTS_W void write( FileStorage& fs, const string& name, double value );
CV_EXPORTS_W void write( FileStorage& fs, const string& name, const string& value );