OPENCV系列博客主要记录自己学习OPENCV的历程,以及存储已经实现的代码,以备后续回顾使用,代码中包含了主要的备注。
一.OpenCV 中(cv::Point/cv::Scalar)API
二.代码实现
#include <opencv2/opencv.hpp>
#include <iostream>
using namespace std;
using namespace cv;
Mat bgImage;
const char* drawdemo_win = "draw shapes and text demo.";
void Mylines(); //子函数声明
void MyRectangle();
void MyElipse();
void MyCircle();
void MyPolygon();
void RandomLineDemo(); //随机线
int main(int argc, char** argv) {
//Step1 读取照片并显示
bgImage = imread("E:/OpenCVLearning/Project/source_image/image1.jpg"); //注意斜线方向
if (!bgImage.data) {
printf("Can not read the image, please check the address...");
return -1;
}
Mylines();
MyRectangle();
MyElipse();
MyCircle();
MyPolygon();
//RandomLineDemo();
putText(bgImage,"Hello World!",Point(300,300),CV_FONT_BLACK,1.0,Scalar(12,23,200),2,8);
namedWindow(drawdemo_win, CV_WINDOW_AUTOSIZE);
imshow(drawdemo_win, bgImage);
waitKey(0);
return 0;
}
void Mylines(){ //子函数实现
//两种不同定义点的方法
Point p1 = Point(20, 30);
Point p2;
p2.x = 300;
p2.y = 300;
Scalar color = Scalar(0,0,255);
line(bgImage,p1,p2,color,1,LINE_8); //!!在图片中绘制p1~p2连线,LINE_AA反锯齿
}
void MyRectangle() {
Rect rect = Rect(100,100,200,200); //!! (顶点x,顶点y,宽度,高度)
Scalar color = Scalar(0, 0, 255);
rectangle(bgImage, rect, color, 2, LINE_8);
}
void MyElipse() {
Scalar color = Scalar(0, 255, 0);
//图片底版,中心点,长轴短轴长度,倾斜程度,原点,旋转角度(绘制完整的椭圆还是椭圆弧度?),颜色,线粗细,线型
ellipse(bgImage,Point(bgImage.cols/2, bgImage.rows/2), Size(bgImage.cols/4, bgImage.rows/8), 90,0,360,color,2,LINE_8);
}
void MyCircle() {
Scalar color = Scalar(0, 255, 255);
Point center = Point(bgImage.cols/2, bgImage.rows /2);
//图片底版,圆心,半径,颜色,线粗细,线型
circle(bgImage,center,150,color,2,8);
}
void MyPolygon() {
Point pts[1][5]; //设置一个二维数组
pts[0][0]= Point(100,100);
pts[0][1] = Point(100, 200);
pts[0][2] = Point(200, 200);
pts[0][3] = Point(200, 100);
pts[0][4] = Point(100, 100);
const Point* ppts[] = { pts[0] };
int npt[] = {5};
Scalar color = Scalar(255, 12, 255);
fillPoly(bgImage,ppts,npt,1,color,8);
}
void RandomLineDemo() {
RNG rng(12345); //随机数生成!!!
Point pt1;
Point pt2;
Mat bg = Mat::zeros(bgImage.size(), bgImage.type());
namedWindow("Random Line demo", CV_WINDOW_AUTOSIZE);
for(int i=0; i<100000;i++){
pt1.x = rng.uniform(0, bgImage.cols); //!!!rng.uniform(0,255) 随机生成0~255之间的数
pt1.y = rng.uniform(0, bgImage.rows);
pt2.x = rng.uniform(0, bgImage.cols);
pt2.y = rng.uniform(0, bgImage.rows);
Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));//!!!rng.uniform(0,255) 随机生成0~255之间的数
line(bg, pt1, pt2, color, 1, LINE_8);
imshow("Random Line demo", bg);
if(waitKey(50) > 0) {
break;
}
}
}
三.代码效果
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