Create Grayscale image using OpenCV

[sourcecode language="cpp"]

#include "stdafx.h"
#include<opencv\cv.h>
#include<opencv\cxcore.h>
#include<opencv\highgui.h>

int _tmain(int argc, _TCHAR* argv[])
{
IplImage *src = cvLoadImage("C:\\Users\\opencv3\\img\\opencv.png",1);
IplImage *dest = cvCreateImage(cvSize(src->width,src->height),8,1);

cvNamedWindow("Original:",1);
cvShowImage("Original:",src);

cvCvtColor(src,dest,CV_RGB2GRAY);//Change from RGB to GrayScale
cvNamedWindow("Gray:",1);
cvShowImage("Gray:",dest);

cvWaitKey(0);

cvDestroyWindow("Original:");
cvReleaseImage(&src);
cvDestroyWindow("Gray:");
cvReleaseImage(&dest);
return 0;
}

[/sourcecode]