OpenCV FeatureDetector Sınıfı

create metodu
Açıklaması şöyle

"FAST" – FastFeatureDetector 
"STAR" – StarFeatureDetector 
"SIFT" – SIFT (nonfree module) 
"SURF" – SURF (nonfree module) 
"ORB" – ORB
"BRISK" – BRISK 
"MSER" – MSER 
"GFTT" – GoodFeaturesToTrackDetector
"HARRIS" – GoodFeaturesToTrackDetector with Harris detector enabled
"Dense" – DenseFeatureDetector 
"SimpleBlob" – SimpleBlobDetector

Also a combined format is supported: 
  feature detector adapter name ( "Grid" – GridAdaptedFeatureDetector,
  "Pyramid" – PyramidAdaptedFeatureDetector )
   + feature detector name (see above), for example: "GridFAST", "PyramidSTAR"

Alternatif Örnek
Şöyle de yapabiliriz.

template<class T> cv::Ptr<T> FeatureDetectorCreator()
{
  return T::create();
};

Şöyle kullanırız

cv::Ptr<SURF> detector = FeatureDetectorCreator<SURF>();

OpenCV FastFeatureDetector Arayüzü

Giriş
Şu satırı dahil ederiz.

#include "opencv2/features2d.hpp"

Constructor
Şöyle yaparız.

Ptr<FeatureDetector> fast = FastFeatureDetector::create (40); 

detect metodu
Şöyle yaparız.

Mat image = imread ("i.jpg");

std::vector<KeyPoint> keypoints;
fast->detect(image, keypoints);

drawKeypoints (image, keypoints, image, Scalar(255, 255, 255), 
  DrawMatchesFlags::DRAW_OVER_OUTIMG);

imshow ("Image", image);