#include <stdio.h>
#include <iostream>
#include "opencv2/core/core.hpp"
#include "opencv2/features2d/features2d.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/calib3d/calib3d.hpp"
#include "opencv2/nonfree/features2d.hpp"
#include <time.h>
int main( int argc, char** argv )
{
cv::Mat img_object = cv::imread( argv[1], 1);
cv::Mat img_scene = cv::imread( argv[2], 1);
std::vector<cv::KeyPoint> keypoints_object, keypoints_scene;
cv::Mat descriptors_object;
cv::Mat descriptors_scene;
int Threshl=60;
int Octaves=4; //(pyramid layer) from which the keypoint has been extracted
float PatternScales=1.0f;
cv::BRISK detector2(Threshl,Octaves,PatternScales);
detector2.create("Feature2D.BRISK");
detector2.detect( img_object, keypoints_object );
detector2.detect( img_scene, keypoints_scene );
detector2.compute(img_object,keypoints_object,descriptors_object);
detector2.compute(img_scene,keypoints_scene,descriptors_scene);
std::cout<< descriptors_object.size() << std::endl;
std::cout<< descriptors_object.isContinuous() << std::endl;
cv::flann::Index idx2(descriptors_object, cv::flann::LshIndexParams(20,10,2) ,cvflann::FLANN_DIST_HAMMING);
idx2.save("flann.bin");
cv::Mat flann_descriptors(2075,64,0);
cv::flann::SavedIndexParams idxfile("flann.bin");
cv::flann::Index idx(flann_descriptors, idxfile ,cvflann::FLANN_DIST_HAMMING);
cv::Mat indices,dists;
idx.knnSearch(descriptors_scene,indices,dists,1);
for(int i=0;i < indices.rows ; i++){
std::cout << indices.at<int>(0,i) << "," << dists.at<int>(0,i) << std::endl;
}
}
The above code throws a bus error when index saved and read from file. The same code works when the index is created directly without using file.
