opencv：基础图像绘制

以你之姓@ 2022-12-10 15:54 191阅读 0赞

> 当前使用opencv版本：4.3.0

#include <opencv2/core/core.hpp>
    #include <opencv2/highgui/highgui.hpp>
    #include <opencv2/imgproc/imgproc.hpp>
    using namespace cv;
    
    
    
    #define WINDOW_NAME1 "【绘制图1】"        //为窗口标题定义的宏 
    #define WINDOW_NAME2 "【绘制图2】"        //为窗口标题定义的宏 
    #define WINDOW_WIDTH 300//定义窗口大小的宏
    
    void DrawEllipse( Mat img, double angle );//绘制椭圆
    void DrawFilledCircle( Mat img, Point center );//绘制圆
    void DrawPolygon( Mat img );//绘制多边形
    void DrawLine( Mat img, Point start, Point end );//绘制线段
    
    int main( void )
    {
        
    
        // 创建空白的Mat图像
        Mat atomImage = Mat::zeros( WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3 );
        Mat rookImage = Mat::zeros( WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3 );
    
        // ---------------------<1>绘制化学中的原子示例图------------------------
    
        //【1.1】先绘制出椭圆
        DrawEllipse( atomImage, 90 );
        DrawEllipse( atomImage, 0 );
        DrawEllipse( atomImage, 45 );
        DrawEllipse( atomImage, -45 );
    
        //【1.2】再绘制圆心
        DrawFilledCircle( atomImage, Point( WINDOW_WIDTH/2, WINDOW_WIDTH/2) );
    
        // ----------------------------<2>绘制组合图-----------------------------
        //【2.1】先绘制出椭圆
        DrawPolygon( rookImage );
    
        // 【2.2】绘制矩形
        rectangle( rookImage,
                   Point( 0, 7*WINDOW_WIDTH/8 ),
                   Point( WINDOW_WIDTH, WINDOW_WIDTH),
                   Scalar( 0, 255, 255 ),
                   -1,
                   8 );
    
        // 【2.3】绘制线段
        DrawLine( rookImage, Point( 0, 15*WINDOW_WIDTH/16 ), Point( WINDOW_WIDTH, 15*WINDOW_WIDTH/16 ) );
    
        // ---------------------------<3>显示绘制出的图像------------------------
        imshow( WINDOW_NAME1, atomImage );
        moveWindow( WINDOW_NAME1, 0, 200 );
        imshow( WINDOW_NAME2, rookImage );
        moveWindow( WINDOW_NAME2, WINDOW_WIDTH, 200 );
    
        waitKey( 0 );
        return(0);
    }
    
    
    
    //-------------------------------【DrawEllipse( )函数】--------------------------------
    //		描述：自定义的绘制函数，实现了绘制不同角度、相同尺寸的椭圆
    //-----------------------------------------------------------------------------------------
    void DrawEllipse( Mat img, double angle )
    {
        
        int thickness = 2;
        int lineType = 8;
    
    
        ellipse( img,
                 Point( WINDOW_WIDTH/2, WINDOW_WIDTH/2 ), // 椭圆中心点
                 Size( WINDOW_WIDTH/4, WINDOW_WIDTH/16 ), //大小
                 angle,                                   // 旋转角度 angle
                 0,
                 360,                                     // 扩展弧度[0, 360]
                 Scalar( 255, 129, 0 ),                   // 颜色：蓝色
                 thickness,                               // 线宽
                 lineType );                              // 线型
    }
    
    
    //-----------------------------------【DrawFilledCircle( )函数】---------------------------
    //		描述：自定义的绘制函数，实现了实心圆的绘制
    //-----------------------------------------------------------------------------------------
    void DrawFilledCircle( Mat img, Point center )
    {
        
        int thickness = -1;
        int lineType = 8;
    
        circle( img,
                center,                                      // 圆心
                WINDOW_WIDTH/32,                             // 半径
                Scalar( 0, 0, 255 ),                         // 颜色：红色
                thickness,                                   // 线宽-1，因此是实心圆
                lineType );
    }
    
    
    //-----------------------------------【DrawPolygon( )函数】--------------------------
    //		描述：自定义的绘制函数，实现了凹多边形的绘制
    //--------------------------------------------------------------------------------------
    void DrawPolygon( Mat img )
    {
        
        int lineType = 8;
    
        //创建一些点
        Point rookPoints[1][20];
        rookPoints[0][0]  = Point(    WINDOW_WIDTH/4,   7*WINDOW_WIDTH/8 );
        rookPoints[0][1]  = Point(  3*WINDOW_WIDTH/4,   7*WINDOW_WIDTH/8 );
        rookPoints[0][2]  = Point(  3*WINDOW_WIDTH/4,  13*WINDOW_WIDTH/16 );
        rookPoints[0][3]  = Point( 11*WINDOW_WIDTH/16, 13*WINDOW_WIDTH/16 );
        rookPoints[0][4]  = Point( 19*WINDOW_WIDTH/32,  3*WINDOW_WIDTH/8 );
        rookPoints[0][5]  = Point(  3*WINDOW_WIDTH/4,   3*WINDOW_WIDTH/8 );
        rookPoints[0][6]  = Point(  3*WINDOW_WIDTH/4,     WINDOW_WIDTH/8 );
        rookPoints[0][7]  = Point( 26*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
        rookPoints[0][8]  = Point( 26*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
        rookPoints[0][9]  = Point( 22*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
        rookPoints[0][10] = Point( 22*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
        rookPoints[0][11] = Point( 18*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
        rookPoints[0][12] = Point( 18*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
        rookPoints[0][13] = Point( 14*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
        rookPoints[0][14] = Point( 14*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
        rookPoints[0][15] = Point(    WINDOW_WIDTH/4,     WINDOW_WIDTH/8 );
        rookPoints[0][16] = Point(    WINDOW_WIDTH/4,   3*WINDOW_WIDTH/8 );
        rookPoints[0][17] = Point( 13*WINDOW_WIDTH/32,  3*WINDOW_WIDTH/8 );
        rookPoints[0][18] = Point(  5*WINDOW_WIDTH/16, 13*WINDOW_WIDTH/16 );
        rookPoints[0][19] = Point(    WINDOW_WIDTH/4,  13*WINDOW_WIDTH/16 );
    
        const Point* ppt[1] = {
         rookPoints[0] };
        int npt[] = {
         20 };
    
        fillPoly( img,
                  ppt,                          // 多边形的顶点集
                  npt,                          // 多边形顶点数目
                  1,
                  Scalar( 255, 255, 255 ),      // 颜色：白色
                  lineType );
    }
    
    
    //-----------------------------------【DrawLine( )函数】--------------------------
    //		描述：自定义的绘制函数，实现了线的绘制
    //---------------------------------------------------------------------------------
    void DrawLine( Mat img, Point start, Point end )
    {
        
        int thickness = 2;
        int lineType = 8;
        line( img,
              start,
              end,
              Scalar( 0, 0, 0 ),
              thickness,
              lineType );
    }

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