C++ OpenCV绘制几何图形

 CV_EXPORTS_W void line(InputOutputArray img, Point pt1, Point pt2, const Scalar& color, int thickness = 1, int lineType = LINE_8, int shift = 0);

 CV_EXPORTS_W void rectangle(InputOutputArray img, Point pt1, Point pt2, const Scalar& color, int thickness = 1, int lineType = LINE_8, int shift = 0);

 CV_EXPORTS_W void rectangle(InputOutputArray img, Rect rec, const Scalar& color, int thickness = 1, int lineType = LINE_8, int shift = 0);

 CV_EXPORTS void polylines(InputOutputArray img, const Point* const* pts, const int* npts, int ncontours, bool isClosed, const Scalar& color, int thickness = 1, int lineType = LINE_8, int shift = 0 );

 CV_EXPORTS_W void polylines(InputOutputArray img, InputArrayOfArrays pts, bool isClosed, const Scalar& color, int thickness = 1, int lineType = LINE_8, int shift = 0 );

 CV_EXPORTS_W void circle(InputOutputArray img, Point center, int radius, const Scalar& color, int thickness = 1, int lineType = LINE_8, int shift = 0);

 CV_EXPORTS_W void ellipse(InputOutputArray img, const RotatedRect& box, const Scalar& color, int thickness = 1, int lineType = LINE_8);

 CV_EXPORTS_W void ellipse(InputOutputArray img, Point center, Size axes, double angle, double startAngle, double endAngle, const Scalar& color, int thickness = 1, int lineType = LINE_8, int shift = 0);

 CV_EXPORTS_W void putText( InputOutputArray img, const String& text, Point org, int fontFace, double fontScale, Scalar color, int thickness = 1, int lineType = LINE_8, bool bottomLeftOrigin = false );

 #include  #include  #include  #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 ); }

 #include  #include  #include  #include  #include  using namespace cv; const int NUMBER = 100; const int DELAY = 5; const int window_width = 900; const int window_height = 600; int x_1 = -window_width/2; int x_2 = window_width*3/2; int y_1 = -window_width/2; int y_2 = window_width*3/2; static Scalar randomColor( RNG& rng ); int Drawing_Random_Lines( Mat image, char* window_name, RNG rng ); int Drawing_Random_Rectangles( Mat image, char* window_name, RNG rng ); int Drawing_Random_Ellipses( Mat image, char* window_name, RNG rng ); int Drawing_Random_Polylines( Mat image, char* window_name, RNG rng ); int Drawing_Random_Filled_Polygons( Mat image, char* window_name, RNG rng ); int Drawing_Random_Circles( Mat image, char* window_name, RNG rng ); int Displaying_Random_Text( Mat image, char* window_name, RNG rng ); int Displaying_Big_End( Mat image, char* window_name, RNG rng ); int main( void ) { int c; char window_name[] = "Drawing_2 Tutorial"; RNG rng( 0xFFFFFFFF ); Mat image = Mat::zeros( window_height, window_width, CV_8UC3 ); imshow( window_name, image ); waitKey( DELAY ); c = Drawing_Random_Lines(image, window_name, rng); if( c != 0 ) return 0; c = Drawing_Random_Rectangles(image, window_name, rng); if( c != 0 ) return 0; c = Drawing_Random_Ellipses( image, window_name, rng ); if( c != 0 ) return 0; c = Drawing_Random_Polylines( image, window_name, rng ); if( c != 0 ) return 0; c = Drawing_Random_Filled_Polygons( image, window_name, rng ); if( c != 0 ) return 0; c = Drawing_Random_Circles( image, window_name, rng ); if( c != 0 ) return 0; c = Displaying_Random_Text( image, window_name, rng ); if( c != 0 ) return 0; c = Displaying_Big_End( image, window_name, rng ); if( c != 0 ) return 0; waitKey(0); return 0; } static Scalar randomColor( RNG& rng ) { int icolor = (unsigned) rng; return Scalar( icolor&255, (icolor>>8)&255, (icolor>>16)&255 ); } int Drawing_Random_Lines( Mat image, char* window_name, RNG rng ) { Point pt1, pt2; for( int i = 0; i = 0 ) { return -1; } } return 0; } int Drawing_Random_Rectangles( Mat image, char* window_name, RNG rng ) { Point pt1, pt2; int lineType = 8; int thickness = rng.uniform( -3, 10 ); for( int i = 0; i = 0 ) { return -1; } } return 0; } int Drawing_Random_Ellipses( Mat image, char* window_name, RNG rng ) { int lineType = 8; for ( int i = 0; i = 0 ) { return -1; } } return 0; } int Drawing_Random_Polylines( Mat image, char* window_name, RNG rng ) { int lineType = 8; for( int i = 0; i= 0 ) { return -1; } } return 0; } int Drawing_Random_Filled_Polygons( Mat image, char* window_name, RNG rng ) { int lineType = 8; for ( int i = 0; i = 0 ) { return -1; } } return 0; } int Drawing_Random_Circles( Mat image, char* window_name, RNG rng ) { int lineType = 8; for (int i = 0; i = 0 ) { return -1; } } return 0; } int Displaying_Random_Text( Mat image, char* window_name, RNG rng ) { int lineType = 8; for ( int i = 1; i = 0 ) { return -1; } } return 0; } int Displaying_Big_End( Mat image, char* window_name, RNG ) { Size textsize = getTextSize("OpenCV forever!", FONT_HERSHEY_COMPLEX, 3, 5, 0); Point org((window_width - textsize.width)/2, (window_height - textsize.height)/2); int lineType = 8; Mat image2; for( int i = 0; i <255; i += 2 ) { image2 = image - Scalar::all(i); putText( image2, "OpenCV forever!", org, FONT_HERSHEY_COMPLEX, 3, Scalar(i, i, 255), 5, lineType ); imshow( window_name, image2 ); if( waitKey(DELAY) >= 0 ) { return -1; } } return 0; }