error image opencv

berikut ini program untuk error 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);
 cvErode(img,img,0,2); cvNamedWindow("error0:", CV_WINDOW_AUTOSIZE); cvShowImage("error0:",img);
    cvWaitKey();
    cvDestroyWindow("Image:");
    cvReleaseImage(&img);
return 0;
}
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