c++ - OpenCV 3.0.0 SurfFeatureDetector and SurfDescriptorExtractor Errors -
i attempting implement opencv 3.0.0 surf feature description , detection after running sample code on opencv site, receive load of errors related surf. idea of going wrong? thanks!
#include <stdio.h> #include <iostream> #include "opencv2/core.hpp" #include "opencv2/features2d.hpp" #include "opencv2/highgui.hpp" #include "opencv2/calib3d.hpp" #include "opencv2/xfeatures2d.hpp" #include <opencv2/nonfree/nonfree.hpp> using namespace cv; using namespace cv::xfeatures2d; void readme(); /** @function main */ int main(int argc, char** argv) { if (argc != 3) { readme(); return -1; } mat img_object = imread(argv[1], imread_grayscale); mat img_scene = imread(argv[2], imread_grayscale); if (!img_object.data || !img_scene.data) { std::cout << " --(!) error reading images " << std::endl; return -1; } //-- step 1: detect keypoints using surf detector int minhessian = 400; ptr<surf> detector = surf.create(minhessian); std::vector<keypoint> keypoints_object, keypoints_scene; detector.detect(img_object, keypoints_object); detector.detect(img_scene, keypoints_scene); //-- step 2: calculate descriptors (feature vectors) surfdescriptorextractor extractor; mat descriptors_object, descriptors_scene; extractor.compute(img_object, keypoints_object, descriptors_object); extractor.compute(img_scene, keypoints_scene, descriptors_scene); //-- step 3: matching descriptor vectors using flann matcher flannbasedmatcher matcher; std::vector< dmatch > matches; matcher.match(descriptors_object, descriptors_scene, matches); double max_dist = 0; double min_dist = 100; //-- quick calculation of max , min distances between keypoints (int = 0; < descriptors_object.rows; i++) { double dist = matches[i].distance; if (dist < min_dist) min_dist = dist; if (dist > max_dist) max_dist = dist; } printf("-- max dist : %f \n", max_dist); printf("-- min dist : %f \n", min_dist); //-- draw "good" matches (i.e. distance less 3*min_dist ) std::vector< dmatch > good_matches; (int = 0; < descriptors_object.rows; i++) { if (matches[i].distance < 3 * min_dist) { good_matches.push_back(matches[i]); } } mat img_matches; drawmatches(img_object, keypoints_object, img_scene, keypoints_scene, good_matches, img_matches, scalar::all(-1), scalar::all(-1), std::vector<char>(), drawmatchesflags::not_draw_single_points); //-- localize object std::vector<point2f> obj; std::vector<point2f> scene; (int = 0; < good_matches.size(); i++) { //-- keypoints matches obj.push_back(keypoints_object[good_matches[i].queryidx].pt); scene.push_back(keypoints_scene[good_matches[i].trainidx].pt); } mat h = findhomography(obj, scene, ransac); //-- corners image_1 ( object "detected" ) std::vector<point2f> obj_corners(4); obj_corners[0] = cvpoint(0, 0); obj_corners[1] = cvpoint(img_object.cols, 0); obj_corners[2] = cvpoint(img_object.cols, img_object.rows); obj_corners[3] = cvpoint(0, img_object.rows); std::vector<point2f> scene_corners(4); perspectivetransform(obj_corners, scene_corners, h); //-- draw lines between corners (the mapped object in scene - image_2 ) line(img_matches, scene_corners[0] + point2f(img_object.cols, 0), scene_corners[1] + point2f(img_object.cols, 0), scalar(0, 255, 0), 4); line(img_matches, scene_corners[1] + point2f(img_object.cols, 0), scene_corners[2] + point2f(img_object.cols, 0), scalar(0, 255, 0), 4); line(img_matches, scene_corners[2] + point2f(img_object.cols, 0), scene_corners[3] + point2f(img_object.cols, 0), scalar(0, 255, 0), 4); line(img_matches, scene_corners[3] + point2f(img_object.cols, 0), scene_corners[0] + point2f(img_object.cols, 0), scalar(0, 255, 0), 4); //-- show detected matches imshow("good matches & object detection", img_matches); waitkey(0); return 0; } /** @function readme */ void readme() { std::cout << " usage: ./surf_descriptor <img1> <img2>" << std::endl; } errors:
1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(34): warning c4832: token '.' illegal after udt 'cv::xfeatures2d::surf' 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(111) : see declaration of 'cv::xfeatures2d::surf' 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(34): error c2275: 'cv::xfeatures2d::surf' : illegal use of type expression 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(111) : see declaration of 'cv::xfeatures2d::surf' 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(34): error c2228: left of '.create' must have class/struct/union 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(38): error c2039: 'detect' : not member of 'cv::ptr<cv::xfeatures2d::surf>' 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(39): error c2039: 'detect' : not member of 'cv::ptr<cv::xfeatures2d::surf>' 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(42): error c2259: 'cv::xfeatures2d::surf' : cannot instantiate abstract class 1> due following members: 1> 'void cv::xfeatures2d::surf::sethessianthreshold(double)' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(127) : see declaration of 'cv::xfeatures2d::surf::sethessianthreshold' 1> 'double cv::xfeatures2d::surf::gethessianthreshold(void) const' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(128) : see declaration of 'cv::xfeatures2d::surf::gethessianthreshold' 1> 'void cv::xfeatures2d::surf::setnoctaves(int)' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(130) : see declaration of 'cv::xfeatures2d::surf::setnoctaves' 1> 'int cv::xfeatures2d::surf::getnoctaves(void) const' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(131) : see declaration of 'cv::xfeatures2d::surf::getnoctaves' 1> 'void cv::xfeatures2d::surf::setnoctavelayers(int)' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(133) : see declaration of 'cv::xfeatures2d::surf::setnoctavelayers' 1> 'int cv::xfeatures2d::surf::getnoctavelayers(void) const' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(134) : see declaration of 'cv::xfeatures2d::surf::getnoctavelayers' 1> 'void cv::xfeatures2d::surf::setextended(bool)' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(136) : see declaration of 'cv::xfeatures2d::surf::setextended' 1> 'bool cv::xfeatures2d::surf::getextended(void) const' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(137) : see declaration of 'cv::xfeatures2d::surf::getextended' 1> 'void cv::xfeatures2d::surf::setupright(bool)' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(139) : see declaration of 'cv::xfeatures2d::surf::setupright' 1> 'bool cv::xfeatures2d::surf::getupright(void) const' : abstract 1> c:\users\belayachiry\documents\opencv\opencv\build\include\opencv2\nonfree\nonfree.hpp(140) : see declaration of 'cv::xfeatures2d::surf::getupright' 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(87): warning c4018: '<' : signed/unsigned mismatch 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(105): warning c4244: 'argument' : conversion 'int' 'float', possible loss of data 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(105): error c3861: 'line': identifier not found 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(106): warning c4244: 'argument' : conversion 'int' 'float', possible loss of data 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(106): error c3861: 'line': identifier not found 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(107): warning c4244: 'argument' : conversion 'int' 'float', possible loss of data 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(107): error c3861: 'line': identifier not found 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(108): warning c4244: 'argument' : conversion 'int' 'float', possible loss of data 1>c:\users\belayachiry\documents\visual studio 2013\projects\imagewatch\imagewatch\source.cpp(108): error c3861: 'line': identifier not found
occurred modifications in opencv 3.0 these tools.
where is
detector.detect(img_object, keypoints_object);shoulddetector->detect(img_object, keypoints_object);surfdescriptorextractor extractor;shouldptr<surf> extractor = surf::create();
take @ website
the others erros should desapear now, guess.
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