opencv提取前景，已经有视频提取前景的代码，怎么改成

#include<opencv2/core/core.hpp>#include<opencv2/imgproc/imgproc.hpp>#include<opencv2/highgui/highgui.hpp>#include<opencv2/video/video.hpp>#include<iostream>usingnamespace...#include <opencv2/core/core.hpp>

#include <opencv2/imgproc/imgproc.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/video/video.hpp>

#include <iostream>

using namespace cv;

using namespace std;

int main()

{

Mat frame;

Mat foreground;// 前景图片

VideoCapture capture("bike.avi");

if (!capture.isOpened())

{

return 0;

}

namedWindow("Extracted Foreground");

namedWindow("Source Video");

// 混合高斯物体

BackgroundSubtractorMOG mog;

bool stop(false);

while (!stop)

{

if (!capture.read(frame))

{

break;

}

// 更新背景图片以及输出前景

mog(frame, foreground, 0.01);

// 输出的前景图片并不是2值图片，要处理一下显示

threshold(foreground, foreground, 128, 255, THRESH_BINARY_INV);

// show foreground

imshow("Extracted Foreground", foreground);

imshow("Source Video", frame);

if (waitKey(10) == 27)

{

stop = true;

}

}

}

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