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我正在使用以下部分代码来绘制冲浪特征：

I am using the following part code to get surf features plotted:
#include<iostream>
using namespace std;
#include<vector>
#include "opencv2/opencv.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/features2d/features2d.hpp"
using namespace cv;


int main(int argc,char** argv)
{
    VideoCapture vid(0);
    if (!vid.isOpened())
    {
    cout<<"Camera not present..Halting the system";
    return -1;
}
namedWindow("Camera_Inp",1);
namedWindow("Surfout",1);
Mat camcap,surfimg;
Mat grayimg;
SurfFeatureDetector featureimg(1000);

vector<KeyPoint>keypoints;
while(vid.isOpened()==true)
{

    vid>>camcap;
imshow("Camera_Inp",camcap);
cvtColor(camcap,grayimg,CV_RGB2GRAY);
featureimg.detect(grayimg,keypoints);
drawKeypoints(grayimg,keypoints,surfimg,Scalar(255,255,255),0);
imshow("Surfout",surfimg);
if (waitKey(30)>=0)return -1;


}




return -1;

}

Visual Studio 给我以下错误：

变量“关键点”周围的堆栈已损坏。

Visual Studio 调试器给出以下错误：

变量“关键点”周围的堆栈已损坏

任何帮助！

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