Invert Image open cv

berikut ini program untuk invert image menggunakan library opencv....selamat mencoba
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#include <cv.h>
#include <highgui.h>
#include <cxcore.h>

using namespace std;
using namespace cv;

int main()
{
IplImage *img = cvLoadImage("lena.bmp");
    cvNamedWindow("Image:", CV_WINDOW_AUTOSIZE);
cvShowImage("Image:",img);
cvNot(img,img); cvNamedWindow("inverted:", CV_WINDOW_AUTOSIZE); cvShowImage("inverted:",img); 
    cvWaitKey();
    cvDestroyWindow("Image:");
    cvReleaseImage(&img);
return 0;
}
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