opencv 基本图形绘制

Posted 2021-02-11 hehe2014

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace cv;

#include <opencv2/imgproc/imgproc.hpp>


#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 600//定义窗口大小的宏

// 椭圆
void DrawEllipse( Mat img, double angle )
{
    int thickness = 2;
    int lineType = 8;

    ellipse(
        img,
        Point( WINDOW_WIDTH/2, WINDOW_WIDTH/2 ),
        Size( WINDOW_WIDTH/4, WINDOW_WIDTH/16 ),
        angle,
        0,
        360,
        Scalar( 255, 129, 0 ),
        thickness,
        lineType );
}


// 圆
void DrawFilledCircle( Mat img, Point center )
{
    int thickness = -1;
    int lineType = 8;

    circle(
        img,
        center,
        WINDOW_WIDTH/32,
        Scalar( 0, 0, 255 ),
        thickness,
        lineType );
}

// 多边形
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,
        npt,
        1,
        Scalar( 255, 255, 255 ),
        lineType );
}

// 线
void DrawLine( Mat img, Point start, Point end )
{
    int thickness = 2;
    int lineType = 8;
    line( img,
        start,
        end,
        Scalar( 0, 0, 0 ),
        thickness,
        lineType );
}


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 );

    //【1.1】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) );

    imshow( WINDOW_NAME1, atomImage );
//    moveWindow( WINDOW_NAME1, 0, 200 );
    

    // ----------------------------<2>绘制组合图-----------------------------
    //【2.1】多边形
    DrawPolygon( rookImage );

    // 【2.2】绘制底部矩形
    rectangle( rookImage,
        Point( 0, 7*WINDOW_WIDTH/8 ),
        Point( WINDOW_WIDTH, WINDOW_WIDTH),
        Scalar( 0, 255, 255 ),
        -1,
        8 );

    // 【2.3】绘制底部线段
    DrawLine( rookImage, Point( 0, 15*WINDOW_WIDTH/16 ), Point( WINDOW_WIDTH, 15*WINDOW_WIDTH/16 ) );
    DrawLine( rookImage, Point( WINDOW_WIDTH/4, 7*WINDOW_WIDTH/8 ), Point( WINDOW_WIDTH/4, WINDOW_WIDTH ) );
    DrawLine( rookImage, Point( WINDOW_WIDTH/2, 7*WINDOW_WIDTH/8 ), Point( WINDOW_WIDTH/2, WINDOW_WIDTH ) );
    DrawLine( rookImage, Point( 3*WINDOW_WIDTH/4, 7*WINDOW_WIDTH/8 ), Point( 3*WINDOW_WIDTH/4, WINDOW_WIDTH ) );

    // ---------------------------<3>显示绘制出的图像------------------------
    imshow( WINDOW_NAME2, rookImage );
    //moveWindow( WINDOW_NAME2, WINDOW_WIDTH, 200 );

    waitKey(0);
    return(0);
}