OpenCV的简单例子

/************************************************************************************************** * 这是从OpenCV的源代码包里找到的代码示例 * 检测摄像头，捕捉图像 * * clyfk 19:09 2016-4-30 *************************************************************************************************/ #include "opencv2/core.hpp" #include "opencv2/imgproc.hpp" #include "opencv2/highgui.hpp" #include "opencv2/videoio.hpp" #include <iostream> using namespace cv; using namespace std; void drawText(Mat & image); int main() { cout << "Built with OpenCV " << CV_VERSION << endl; Mat image; VideoCapture capture; capture.open(0); // 打开设备-即摄像头 if(capture.isOpened()) // 如果成功打开摄像设备 { cout << "Capture is opened" << endl; for(;;) { capture >> image; //捕捉到的图像给image if(image.empty()) break; drawText(image); imshow("Sample", image); // 显示图像在Sample窗口上 if(waitKey(10) >= 0) break; } } else // 没有捕捉到摄像-打不开摄像头 { cout << "No capture" << endl; image = Mat::zeros(480, 640, CV_8UC1); drawText(image); imshow("Sample", image); waitKey(0); } return 0; } void drawText(Mat & image) { // 插入文字 参数为：承载的图片，插入的文字，文字的位置，字体，大小，颜色...... putText(image, "Hello OpenCV", Point(20, 50), FONT_HERSHEY_COMPLEX, 1, // font face and scale Scalar(255, 255, 255), // white 1, LINE_AA); // line thickness and type }