cv :: goodFeaturesToTrack将角矢量大小设为零

Question

我正在尝试使用opencv cv::goodFeaturesToTrack获取角点。我做了以下代码。但输出角矢量大小始终为零，但拐角容量发生了变化。

using namespace cv;

void main()
{
    Mat img = imread("cameraman.tif",CV_LOAD_IMAGE_GRAYSCALE);

    std::vector<Point2f> Corners;

    cv::goodFeaturesToTrack(img,Corners,10,0.01,10);

    std::cout<<Corners.size()<<endl;
}

输出为0