c++ - 加载保存的 SURF 关键点

Question

我正在检测图像中的 SURF 特征，然后将它们写入 yml 文件。然后我想再次从 yml 文件加载特征以尝试检测对象，但目前我无法加载关键点以将它们绘制在图像上。

我是这样写要点的:

cv::FileStorage fs("keypointsVW.yml", cv::FileStorage::WRITE);
write(fs, "keypoints_1", keypoints_1);
fs.release();

我正在尝试这样阅读它们:

cv::FileStorage fs2("keypointsVW.yml", cv::FileStorage::READ);
read(fs2, "keypoints_1", keypoints_1);
fs2.release();

但这会产生大量错误。

检测和绘制代码:

    cv::Mat img_1 = cv::imread(argv[1], CV_LOAD_IMAGE_GRAYSCALE);
    int minHessian = 400;
    cv::SurfFeatureDetector detector(minHessian);
    std::vector<cv::KeyPoint> keypoints_1;
    detector.detect(img_1, keypoints_1);
    cv::Mat img_keypoints_1;
    //......write code
    //.......read code
    drawKeypoints(img_1, keypoints_1, img_keypoints_1);
    imshow("keypoints_1", img_keypoints_1);

Answer 1

找到解决方案，我会把它贴在这里，以防其他人遇到同样的问题。

std::vector<cv::KeyPoint> testPoints;
cv::FileStorage fs2("keypointsVW.yml", cv::FileStorage::READ);
cv::FileNode kptFileNode = fs2["keypointsVW"];
read(kptFileNode, testPoints);
fs2.release();