本文是《OpenCV实战从入门到精通》系列之第10篇
【OpenCV】OpenCV实战从入门到精通之一 -- OpenCV宏的讲解
【OpenCV】OpenCV实战从入门到精通之二 -- OpenCV如何进行图像腐蚀操作
【OpenCV】OpenCV实战从入门到精通之三 -- canny边缘检测
【OpenCV】OpenCV实战从入门到精通之四 -- 常用的函数讲解（mat、imread、imshow、imwrite、nameWindow）
【OpenCV】OpenCV实战从入门到精通之五 -- 教你使用Rect()函数
【OpenCV】OpenCV实战从入门到精通之六 -- 教你如何使用滑动条-createTrackbar()函数
【OpenCV】OpenCV实战从入门到精通之七 -- 教你如何使用鼠标操作SetMouseCallback
【OpenCV】OpenCV实战从入门到精通之八 -- 带你深入理解Mat容器
【OpenCV】OpenCV实战从入门到精通之九 -- OpenCV有哪些常用的数据结构和函数
目录
程序我已经详细注释
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#include <opencv2/opencv.hpp>
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#include <iostream>
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#include <string>
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#define WINDOW_WIDTH 600 //窗口大小
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#define WINDOW_NAME1 "【绘制图1】"
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#define WINDOW_NAME2 "【绘制图2】"
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using namespace std;
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using namespace cv;
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//------------------------【绘制椭圆】------------------------------------------------------------------
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// 自定义，绘制不同角度，相同尺寸的椭圆
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// 画在img图上，中心点坐标，大小位于矩形内（长、宽），旋转角度，扩展弧度0，360，图形颜色，线宽，线型
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//------------------------------------------------------------------------------------------------------
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void DrawEllipse(Mat img, double angle)
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{
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int thickness = 2;
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int lineType = 2;
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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);
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}
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//----------------------------【实心圆绘制】----------------------------------
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// 自定义，绘制实心圆
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// 画在img图上，圆心，圆的半径，圆的颜色，线宽-1为实心，线型
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//----------------------------------------------------------------------------
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void DrawFilledCircle(Mat img, Point center)
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{
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int thickness = -1;
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int lineType = 8;
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circle(img, center, WINDOW_WIDTH / 32, Scalar(0, 0, 255), thickness, lineType);
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}
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//---------------------------【凹边型绘制】--------------------------------------
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// 自定义，凹边型绘制
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//将多边形画到图像上，多边形顶点集为ppt，多边形顶点数为npt，多边形数量为1，多边形定义白色
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//---------------------------------------------------------------------
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void DrawPolygon(Mat img)
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{
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int lineType = 8;
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//创建一些点
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Point rookPoint[1][20]; //二位数组，因为Point 要保存两个值
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rookPoint[0][0] = Point(WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8);
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rookPoint[0][1] = Point(3 * WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8);
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rookPoint[0][2] = Point(3 * WINDOW_WIDTH / 4, 13 * WINDOW_WIDTH / 16);
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rookPoint[0][3] = Point(11 * WINDOW_WIDTH / 16, 13 * WINDOW_WIDTH / 16);
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rookPoint[0][4] = Point(19 * WINDOW_WIDTH / 32, 3 * WINDOW_WIDTH / 8);
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rookPoint[0][5] = Point(3 * WINDOW_WIDTH / 4, 3 * WINDOW_WIDTH / 8);
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rookPoint[0][6] = Point(3 * WINDOW_WIDTH / 4, WINDOW_WIDTH / 8);
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rookPoint[0][7] = Point(26 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
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rookPoint[0][8] = Point(26 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
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rookPoint[0][9] = Point(22 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
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rookPoint[0][10] = Point(22 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
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rookPoint[0][11] = Point(18 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
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rookPoint[0][12] = Point(18 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
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rookPoint[0][13] = Point(14 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
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rookPoint[0][14] = Point(14 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
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rookPoint[0][15] = Point(WINDOW_WIDTH / 4, WINDOW_WIDTH / 8);
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rookPoint[0][16] = Point(WINDOW_WIDTH / 4, 3 * WINDOW_WIDTH / 8);
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rookPoint[0][17] = Point(13 * WINDOW_WIDTH / 32, 3 * WINDOW_WIDTH / 8);
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rookPoint[0][18] = Point(5 * WINDOW_WIDTH / 16, 13 * WINDOW_WIDTH / 16);
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rookPoint[0][19] = Point(WINDOW_WIDTH / 4, 13 * WINDOW_WIDTH / 16);
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const Point* ppt[1] = { rookPoint[0] };
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int npt[] = { 20 };
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fillPoly(img, ppt, npt, 1, Scalar(255, 255, 255), lineType);
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}
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//-------------------------------【画直线段】------------------------------
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// 在img图片上画一条从start到end的直线段
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// 黑色，线粗，线型
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//-----------------------------------------------------------------
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void DrawLine(Mat img, Point start, Point end)
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{
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int thickness = 2;
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int lineType = 8;
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line(img, start, end, Scalar(0, 0, 0), thickness, lineType);
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}
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//-------------【main函数，程序主入口】--------------
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int main()
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{
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//创建空白Mat图像
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Mat atomImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3);
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Mat rookImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3);
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//----------------------<1>绘制第一幅图------------------------------------
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//【1.1】绘制椭圆
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DrawEllipse(atomImage, 90);
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DrawEllipse(atomImage, 0);
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DrawEllipse(atomImage, 45);
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DrawEllipse(atomImage, -45);
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//【1.2】绘制圆心
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DrawFilledCircle(atomImage, Point(WINDOW_WIDTH / 2, WINDOW_WIDTH / 2));
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//-----------------------<2>绘制第二幅图--------------------------
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//【2.1】绘制椭圆
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DrawPolygon(rookImage);
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//【2.2】绘制矩形
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rectangle(rookImage, Point(0, 7 * WINDOW_WIDTH / 8), Point(WINDOW_WIDTH, WINDOW_WIDTH), Scalar(0, 255, 255), -1, 8);
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//【2.3】绘制线段
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DrawLine(rookImage, Point(0, 15 * WINDOW_WIDTH / 16), Point(WINDOW_WIDTH, 15 * WINDOW_WIDTH / 16));
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DrawLine(rookImage, Point(WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8), Point(WINDOW_WIDTH / 4, WINDOW_WIDTH));
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DrawLine(rookImage, Point(WINDOW_WIDTH / 2, 7 * WINDOW_WIDTH / 8), Point(WINDOW_WIDTH / 2, WINDOW_WIDTH));
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DrawLine(rookImage, Point(3 * WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8), Point(3 * WINDOW_WIDTH, WINDOW_WIDTH / 4));
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//-------------------------<3>显示图像--------------------------
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imshow(WINDOW_NAME1, atomImage);
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moveWindow(WINDOW_NAME1, 0, 200);
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imshow(WINDOW_NAME2, rookImage);
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moveWindow(WINDOW_NAME2, WINDOW_WIDTH, 200);
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waitKey();
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system("pause");
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return 0;
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}
结果如图：
文章来源: kings.blog.csdn.net，作者：人工智能博士，版权归原作者所有，如需转载，请联系作者。
原文链接：kings.blog.csdn.net/article/details/102459003