opencv从一张图片抠图到另外一张图片

opencv从一张图片抠图到另外一张图片：

  代码：

#include <opencv2/opencv.hpp>
#include <iostream>
#include <math.h>
#include <opencv.hpp>

using namespace cv;
using namespace std;
int main()
{
    Mat SpeaceMap = imread("../img/black.jpg");
    Mat Car = imread("../img/car.jpg");
    Mat dst= SpeaceMap.clone();

    Mat roi = dst(Rect(0, 360, Car.cols, Car.rows)); //(0,360) //选取粘贴区域 
    //Mat mask(roi.rows, roi.cols, roi.depth(), Scalar(3));  
    Car.copyTo(roi);

    imshow("SpeaceMap",SpeaceMap);
    imshow("Car",Car);  
    imshow("dst", dst);
    waitKey(); 

    return 0;

}