Yml文件的读取与写入

C++版本 based on OpenCV 2.1

/***********************************************************************

 * OpenCV2.1 example

 * ByPebbler Chung 2010

 ***********************************************************************/

 

#include "cv.h"

#include "highgui.h"

#include "iostream"

 

using namespace cv; //下面的所有cv相关类型不用加上前缀了

 

int main(int argc, char* argv[])

{

     FileStorage fs("test.yml", FileStorage::WRITE); //写的形式打开yml。当然也可以打开xml，主要看后缀

 

     fs << "i" << 5 << "r" << 3.1 << "str" << "ABCDEFGH"; //存入整型、浮点型、字符串

 

     Mat writeInImg = imread( "lena.jpg" ); //载入Lena妞的图片载入

     imshow( "Lena_from_jpg", writeInImg ); //看一看Lena妞是否健在

     fs << "lena" << writeInImg; //将Lena妞的图片矩阵插入test.yml

 

     fs.release();

 

     FileStoragereadfs("test.yml", FileStorage::READ); //读的形式打开yml。当然也可以打开xml，主要看后缀

 

     if(readfs.isOpened() )

     {

         int i1 = (int)readfs["i"];

         double r1 = (double)readfs["r"];

         string str1= (string)readfs["str"];

 

         MatreadOutImg;

         readfs["lena"] >> readOutImg; //把Lena从yml中取出

         imshow( "Lena_from_yml", readOutImg ); //看看是不是跟之前放进去的是同一个人

 

         cout<<"read out i:"<<i1<<endl<<"read out r:"<<r1<<endl<<"read out str:"<<str1<<endl;

     }

     readfs.release();

 

     waitKey();

 

     return 0;

 

}

结果 test.yml

%YAML:1.0

i: 5

r: 3.1000000000000001e+000

str: ABCDEFGH

lena: !!opencv-matrix

   rows: 512 //lena的身高

   cols: 512 //lena的三围（正方形？惊！）

   dt:"3u"

   data: [ lena的数字版裸体。。。。。。]