#include <iostream>

 #include <opencv2/opencv.hpp>

 using namespace std;

 using namespace cv;

 int main()

 {

     Mat img = imread("e.bmp");

     imshow("原图", img);

     char tem[];

     sprintf(tem, "%s","Where are you?");

     //img原图像，tem输出内容，Point输出位置，0.9文字大小Scalar（）颜色，1字体粗细，

     putText(img, tem, Point(, ), FONT_HERSHEY_SIMPLEX, 0.9, Scalar(, , ),,);//在图片上写文字

     namedWindow("效果图");

     imshow("效果图", img);

     waitKey();

     return ;

 }