OpenCV 教程 03 : 鼠标操作

示例代码

#include <opencv2/opencv.hpp>

using namespace cv;

void onMouseHandle(int event, int x, int y, int flags, void *param)
{
    switch (event) {
    // 鼠标移动
    case EVENT_MOUSEMOVE:
        break;
    // 左键按下
    case EVENT_LBUTTONDOWN:
        circle(*(Mat*)param, Point(x, y), 20, Scalar(0, 0, 255));
        break;
    default:
        break;
    }
    imshow("原图", *(Mat*)param);
}

int main(int argc, char const *argv[])
{
    Mat image = imread("1.jpg");
    namedWindow("原图");
    setMouseCallback("原图", onMouseHandle, &image);

    waitKey(0);
    return 0;
}

运行结果