samples/cpp/tutorial_code/ImgProc/basic_drawing/Drawing_1.cpp

使用绘图函数的示例，查看 相应的教程 获取更多详细信息

 
#include <opencv2/core.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/highgui.hpp>
 
#define w 400
 
using namespace cv;
 
void MyEllipse( Mat img, double angle );
void MyFilledCircle( Mat img, Point center );
void MyPolygon( Mat img );
void MyLine( Mat img, Point start, Point end );
 
int main( void ){
 
  char atom_window[] = "Drawing 1: Atom";
  char rook_window[] = "Drawing 2: Rook";
 
  Mat atom_image = Mat::zeros( w, w, CV_8UC3 );
  Mat rook_image = Mat::zeros( w, w, CV_8UC3 );
 
 
MyEllipse( atom_image, 90 );
MyEllipse( atom_image, 0 );
MyEllipse( atom_image, 45 );
MyEllipse( atom_image, -45 );
 
MyFilledCircle( atom_image, Point( w/2, w/2) );
 
 
MyPolygon( rook_image );
 
rectangle( rook_image,
         Point( 0, 7*w/8 ),
         Point( w, w),
         Scalar( 0, 255, 255 ),
FILLED,
LINE_8 );
 
MyLine( rook_image, Point( 0, 15*w/16 ), Point( w, 15*w/16 ) );
MyLine( rook_image, Point( w/4, 7*w/8 ), Point( w/4, w ) );
MyLine( rook_image, Point( w/2, 7*w/8 ), Point( w/2, w ) );
MyLine( rook_image, Point( 3*w/4, 7*w/8 ), Point( 3*w/4, w ) );
 
imshow( atom_window, atom_image );
moveWindow( atom_window, 0, 200 );
imshow( rook_window, rook_image );
moveWindow( rook_window, w, 200 );
 
waitKey( 0 );
  return(0);
}
 
 
void MyEllipse( Mat img, double angle )
{
  int thickness = 2;
  int lineType = 8;
 
ellipse( img,
       Point( w/2, w/2 ),
       Size( w/4, w/16 ),
angle,
       0,
       360,
       Scalar( 255, 0, 0 ),
thickness,
lineType );
}
 
void MyFilledCircle( Mat img, Point center )
{
  circle( img,
center,
w/32,
      Scalar( 0, 0, 255 ),
FILLED,
LINE_8 );
}
 
void MyPolygon( Mat img )
{
  int lineType = LINE_8;
 
  Point rook_points[1][20];
rook_points[0][0] = Point( w/4, 7*w/8 );
rook_points[0][1] = Point( 3*w/4, 7*w/8 );
rook_points[0][2] = Point( 3*w/4, 13*w/16 );
rook_points[0][3] = Point( 11*w/16, 13*w/16 );
rook_points[0][4] = Point( 19*w/32, 3*w/8 );
rook_points[0][5] = Point( 3*w/4, 3*w/8 );
rook_points[0][6] = Point( 3*w/4, w/8 );
rook_points[0][7] = Point( 26*w/40, w/8 );
rook_points[0][8] = Point( 26*w/40, w/4 );
rook_points[0][9] = Point( 22*w/40, w/4 );
rook_points[0][10] = Point( 22*w/40, w/8 );
rook_points[0][11] = Point( 18*w/40, w/8 );
rook_points[0][12] = Point( 18*w/40, w/4 );
rook_points[0][13] = Point( 14*w/40, w/4 );
rook_points[0][14] = Point( 14*w/40, w/8 );
rook_points[0][15] = Point( w/4, w/8 );
rook_points[0][16] = Point( w/4, 3*w/8 );
rook_points[0][17] = Point( 13*w/32, 3*w/8 );
rook_points[0][18] = Point( 5*w/16, 13*w/16 );
rook_points[0][19] = Point( w/4, 13*w/16 );
 
  const Point* ppt[1] = { rook_points[0] };
  int npt[] = { 20 };
 
  fillPoly( img,
ppt,
npt,
        1,
        Scalar( 255, 255, 255 ),
lineType );
}
 
void MyLine( Mat img, Point start, Point end )
{
  int thickness = 2;
  int lineType = LINE_8;
 
  line( img,
start,
end,
    Scalar( 0, 0, 0 ),
thickness,
lineType );
}