#include <opencv2/opencv.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char** argv)
{
Mat canvas = Mat::zeros(Size(512, 512), CV_8UC3);
// 相关绘制的API
/* line 参数说明:
1. 在哪个图像上绘制
2. 起点
3. 终点
4. 颜色
5. 线宽
6. type:绘制模式,LINE_AA反锯齿,LINE_8就是8
7. 水平位移,默认0,一般用不到
*/
line(canvas, Point(0, 0), Point(200, 200), Scalar(0,0,255), 5, LINE_8);
Rect rect(100, 100, 200, 200);
rectangle(canvas, rect, Scalar(255, 0, 0), 4, LINE_8);
circle(canvas, Point(256, 256), 100, Scalar(0, 255, 0), 1, 8);
RotatedRect rrt;
rrt.center = Point2f(256, 256);
rrt.angle = 45; // 这里是角度
rrt.size = Size(100, 200);
ellipse(canvas, rrt, Scalar(0, 255, 255), 1, 8);
//线宽如果为-1,则会变成填充模式
namedWindow("canvas", WINDOW_AUTOSIZE);
imshow("canvas", canvas);
// 绘制随机形状
Mat image = Mat::zeros(Size(512, 512), CV_8UC3);
int x1 = 0, y1 = 0;
int x2 = 0, y2 = 0;
RNG rng(12345);
while (true) {
x1 = (int)rng.uniform(0, 512);
x2 = (int)rng.uniform(0, 512);
y1 = (int)rng.uniform(0, 512);
y2 = (int)rng.uniform(0, 512);
int w = abs(x2 - x1);
int h = abs(y2 - y1);
rect.x = x1;
rect.y = y1;
rect.width = w;
rect.height = h;
image = Scalar(0, 0, 0);
Scalar color(rng.uniform(0, 256), rng.uniform(0, 256), rng.uniform(0, 256));
rectangle(image, rect, color, 1, 8);
//line(image, Point(x1, y1), Point(x2, y2), Scalar(rng.uniform(0, 256), rng.uniform(0, 256), rng.uniform(0, 256)), 1, 8);
imshow("image", image);
char c = waitKey(10);
if (c == 27) {
break;
}
}
waitKey(0);
destroyAllWindows();
return 0;
}
原文地址:https://www.cnblogs.com/wbyixx/p/12244309.html
时间: 2024-10-03 23:47:19