How to convert opencv IplImage to cv::Mat and cv::Mat to IplImage

Hey guys

     This is a tutorial for converting OpenCV image handlers 

*IplImage to cv::Mat

*cv::Mat to IplImage

IplImage to cv::Mat example program

Ipltomat.cpp

 ///Opencv 2.4.2   
 #include "opencv2/highgui/highgui.hpp"  
 #include <iostream>  
 #include <stdio.h>  
 using namespace std;  
 using namespace cv;  
 int main(int argc,  
    char *argv[]  
  )  
 {  
 ///Loading image to IplImage  
 IplImage *img=cvLoadImage(argv[1]);  
 cvShowImage("Ipl",img);  
 ///converting IplImage to cv::Mat  
 Mat image=cvarrToMat(img);  
 imshow("Mat",image);  
 waitKey();  
 return 0;  
 }  

Command for compiling opencv program in Ubuntu

g++ Ipltomat.cpp `pkg-config opencv --cflags --libs` -o Ipltomat


cv::Mat to IplImage example program

MattoIpl.cpp

 ///Opencv 2.4.2  
 #include "opencv2/highgui/highgui.hpp"  
 #include <iostream>  
 #include <stdio.h>  
 using namespace std;  
 using namespace cv;  
 int main(int argc,  
  char *argv[]  
  )  
 {  
 ///Reading Image to cv::Mat  
 Mat image =imread(argv[1],1);  
 ///Converting Mat to IplImage  
 IplImage test = image;  
 ///showing image from mat  
 imshow("Mat",image);  
 ///showing image from IplImage  
 cvShowImage("Ipl",&test);  
 waitKey();  
 return 0;  
 }  

Compiling command


g++ MattoIpl.cpp `pkg-config opencv --cflags --libs` -o MattoIpl


Output