OpenCV3 之 基本图形的绘制
发布日期:2021-07-01 03:59:38
浏览次数:3
分类:技术文章
本文共 4165 字,大约阅读时间需要 13 分钟。
文章目录
1. 绘制直线的line函数
line(图像img,起点,终点,Scalar(0,0,0),线宽,线型);
2. 绘制椭圆的ellipse函数
ellipse(图像img,Point(点x,点y),Size(长,宽),旋转角度,0,360,Scalar(B,G,R),线宽,线型);
3. 绘制矩形的rectangle函数
rectangle(图像img,Point(起点x,起点y),Point(终点x,终点y),Scalar(0,255,255),线宽,线型)
4. 绘制圆的circle函数
circle(图像img,圆心坐标,半径,Scalar(0,0,255),线宽,线性)
注意:如果设置线宽为-1,则绘制的图形是实心的
5. 绘制填充多边形的fillPoly函数
fillPoly(图像img,顶点集,顶点数目,多边形数量,颜色,线形)
// 例子Point rookRoints[1][20];rookPoints[0][0]=Point(x0,y0);……rookPoints[0][19]=Point(x19,y19);const Point* ppt[1] = { rookPoints(0)};int npt[]={ 20};fillPoly(img,ppt,npt,1,Scalar(255,255,255),lineType);
例子
// By浅墨 毛星云#include#include using namespace std;using namespace cv;#define WINDOW_NAME1 "【原子结构图】" //为窗口标题定义的宏 #define WINDOW_NAME2 "【图形组合test】" //为窗口标题定义的宏 #define WINDOW_WIDTH 600 //定义窗口大小的宏// 绘制不同角度、尺寸相同的椭圆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 );}// 绘制实心圆void DrawFilledCircle(Mat img, Point center){ int thickness = -1; int lineType = 8; circle(img, center, WINDOW_WIDTH / 32, Scalar(0, 0, 255), thickness, lineType);}// 绘制凹多边形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);}// 绘制直线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() { Mat atomImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3); Mat rookImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3); //绘制 原子结构图 DrawEllipse(atomImage, 90); DrawEllipse(atomImage, 0); DrawEllipse(atomImage, 45); DrawEllipse(atomImage, -45); DrawFilledCircle(atomImage, Point(WINDOW_WIDTH / 2, WINDOW_WIDTH / 2)); //绘制 组合图 DrawPolygon(rookImage); rectangle(rookImage, Point(0, 7 * WINDOW_WIDTH / 8), Point(WINDOW_WIDTH, WINDOW_WIDTH), Scalar(0, 255, 255), -1, 8 ); 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)); // 显示图像 imshow(WINDOW_NAME1, atomImage); moveWindow(WINDOW_NAME1, 0, 200); imshow(WINDOW_NAME2, rookImage); moveWindow(WINDOW_NAME2, WINDOW_WIDTH, 200); waitKey(0); return 0;}
参考书籍《OpenCV3编程入门》
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