opencv - 在图像集上使用FeatureDetector的第二个变体

Question

我能够成功地将许多图像加载到 vector vector<Mat>中。加载后的图像可以使用imread函数显示。

问题是，我想使用第二种方法对这组图像应用SIFT，如文档中所述:

void FeatureDetector::detect(const vector<Mat>& images, vector<vector<KeyPoint>>& keypoints, const vector<Mat>& masks=vector<Mat>() ) const

这将产生以下错误:

error C2664: 'void cv::FeatureDetector::detect(const cv::Mat &,std::vector<_Ty> &,const cv::Mat &) const' : cannot convert parameter 1 from 'std::vector<_Ty>' to 'const cv::Mat &'

我正在使用的代码:

vector<Mat> images;

/* code to add all images to vector not shown as its messy but it was performed with FindFirstFile of windows.h. All images loaded correctly as they can be read by imread*/

initModule_nonfree();

Ptr<FeatureDetector> get_keypoints = FeatureDetector::create("SIFT");
vector<KeyPoint> keypoints;
get_keypoints->detect(images , keypoints);

在 get_keypoints->detect(images , keypoints);中检测到错误

Answer 1

根据detect签名，keypoints应该是vector<vector<KeyPoint>>，但是您将其声明为vector<KeyPoint>。