VS C# OpenCV图像识别+文字打印

#include <opencv2/opencv.hpp> #include<opencv2/highgui/highgui.hpp> #include<opencv2/imgproc/imgproc.hpp> #include <iostream> using namespace cv; using namespace std; int main() { Mat edges; Mat src1 = imread("D:\\2.jpg"); //Mat src1(src, Rect(1200, 1040, 300, 300));//ROI设置 if (!src1.data) return -1; //imshow("src1", src1); cvtColor(src1, edges, CV_BGR2GRAY);//灰度图 GaussianBlur(edges, edges, Size(9, 9), 2, 2);//高斯滤波 vector<Vec3f>circles;//坐标 HoughCircles(edges, circles, CV_HOUGH_GRADIENT, 1, 70, 200, 70, 0, 0);//霍夫圆变换检测圆 for (size_t i = 0; i < circles.size(); i++) { Point center(cvRound(circles[i][0]), cvRound(circles[i][1])); int radius = cvRound(circles[i][2]); circle(src1, center, 3, Scalar(0, 0, 255), -1, 8, 0);//绘制圆心 circle(src1, center, radius, Scalar(0, 255, 0), 2, 8, 0);//绘制圆轮廓 } putText(src1, "Hello", cvPoint(50, 50), FONT_HERSHEY_COMPLEX, 0.5, Scalar(0, 0, 255));//图片上显示字符 imshow("效果图", src1); //imshow("huidu", edges); waitKey(0); return 0; }