学习OpenCV第三章练习题——３-4

#include "cv.h"
#include "highgui.h"

int main(int argc,char** argv)
{
    IplImage* img1=cvCreateImage(cvSize(100,100),IPL_DEPTH_8U,3);
    cvZero(img1);
    cvRectangle(img1,cvPoint(20,5),cvPoint(40,20),cvScalar(0,255,0,0),1,8,0);
    cvNamedWindow("img1",CV_WINDOW_AUTOSIZE);
    cvShowImage("img1",img1);
    cvWaitKey(0);
    cvReleaseImage(&img1);
    cvDestroyAllWindows();
    return 0;
}