class_id         2180 modules/core/include/opencv2/core/types.hpp     : pt(0,0), size(0), angle(-1), response(0), octave(0), class_id(-1) {}
class_id         2184 modules/core/include/opencv2/core/types.hpp     : pt(_pt), size(_size), angle(_angle), response(_response), octave(_octave), class_id(_class_id) {}
class_id         2188 modules/core/include/opencv2/core/types.hpp     : pt(x, y), size(_size), angle(_angle), response(_response), octave(_octave), class_id(_class_id) {}