AGAST            7445 modules/features2d/src/agast.cpp void AGAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool nonmax_suppression)
AGAST            7512 modules/features2d/src/agast.cpp void AGAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool nonmax_suppression, int type)