I want to display output image in different windows in OpenCV - c

Question

I want to display the same image multiple times in different windows, for which I have used a for loop but I am getting only one window display. Can anybody provide me any suggestion on how to display output images in multiple windows? Following is the code in OpenCV with C API. Here, I am simply loading an image from argv[1] and trying to display it in 4 different windows.
#include "cv.h"
#include "highgui.h"
#include <stdlib.h>
#include <stdio.h>
int main( int argc, char** argv ) {
int i;
IplImage* img = cvLoadImage( argv[1],1);
cvMoveWindow("Example1", 100, 100);
cvNamedWindow( "Example1", 1);
for(i =0; i<=4;i++) // for loop to display the same image in 4 different windows
{
cvShowImage( "Example1", img );
}
cvWaitKey(0);
cvReleaseImage( &img );
cvDestroyWindow( "Example1" );
}
P.S. I have asked a similar question show multiple images in different window in OpenCV before which was not solved and the code was difficult to understand so I am trying this question with a simpler code.

Answer 1

Here you go
int i;
IplImage* img = cvLoadImage("/home/khashayar/Downloads/bug14.png", 1);
cvMoveWindow("Example1", 100, 100);
cvNamedWindow("Example1", 1);
for (i = 0; i <= 4; i++)
{
char str[5] = "test";
str[4] = i+48;
cvShowImage(str, img);
}
cvWaitKey(0);
cvReleaseImage(&img);
cvDestroyWindow("Example1");

Answer 2

for(i =0; i<=4;i++) // hmm, i<=4 will actually run 5 times ...
{
cvShowImage( "Example1", img ); // <-- same window name for all == only 1 shown
}
but, please discard the c api and use c++ !. please !
#include "opencv2/opencv.hpp"
int main( int argc, char** argv ) {
cv::Mat img = cv::imread( argv[1],1);
for( int i=0; i<4; i++ ) // for loop to display the same image in 4 different windows
{
cv::String name = cv::format("Example%d",i);
cv::namedWindow( name, 1);
cv::imshow( name, img );
}
cv::waitKey(0);
}