OpenCV基础几何绘图和文字输出

#include <highgui.h>

using namespace std;

CvFont font;

int main()
{
IplImage *img = cvCreateImage( cvSize(320,480),IPL_DEPTH_8U,3 );
cvLine(img,cvPoint(10,10),cvPoint(100,100),cvScalar(0,255,255));
cvRectangle(img,cvPoint(100,10),cvPoint(150,30),cvScalar(245,250,0));
cvCircle(img,cvPoint(200,200),50,cvScalar(0,0,0));
cvInitFont(&font,CV_FONT_HERSHEY_COMPLEX,1,1,1,2,8);
cvPutText(img,"Hello World!",cvPoint(10,300),&font,cvScalar(255,250,0));

cvNamedWindow("Example1",CV_WINDOW_AUTOSIZE);
cvShowImage("Example1",img);
cvWaitKey(0);
cvDestroyWindow("Example1");
cvReleaseImage( &img );

return 0;
}