I try to match orb descriptors with FlannDescriptorMatcher && LSH indexing
The following is my code
Ptr<ORB> orb =ORB::create();
//--FEATure extraction & MATCHING
DescriptorMatcher* m_matcherPtr;
Ptr<cv::flann::IndexParams> indexParams = new cv::flann::LshIndexParams(8, 30, 2);
m_matcherPtr =(new FlannBasedMatcher(indexParams));
for (size_t i = 0; i < queriesnames.size(); i++) {
image_1 = imread(queriespath[i], CV_LOAD_IMAGE_GRAYSCALE);
orb->detect(image_1,keypoints_r);
orb->compute(image_1,keypoints_r,descriptors_r);
m_matcherPtr->add(descriptors_r);
}
m_matcherPtr->train();
image_1=imread(imgName_1,CV_LOAD_IMAGE_GRAYSCALE);
orb->detect(image_1,keypoints_1);
orb->compute(image_1,keypoints_1,descriptors_1);
image_2=imread(imgName_2,CV_LOAD_IMAGE_GRAYSCALE);
orb->detect(image_2,keypoints_2);
orb->compute(image_2,keypoints_2,descriptors_2);
vector<vector<DMatch> > matches;
vector< DMatch > good_matches;
vector<Mat> traindescriptors=m_matcherPtr->getTrainDescriptors();
m_matcherPtr->knnMatch(descriptors_1,descriptors_2,matches,2);
size_t num =matches.size();
for(size_t i = 0; i < num; i++ )
{
if(matches[i][0].distance < 0.9*matches[i][1].distance){
good_matches.push_back(matches[i][0]);
}
}
//-- Draw only "good" matches
Mat img_matches;
drawMatches( image_1, keypoints_1, image_2, keypoints_2,
good_matches, out_img);
//-- Show detected matches
imshow( "Good Matches", out_img );
waitKey(0);
However, I get the following error message (when debugging)
Program received signal SIGSEGV, Segmentation fault.
0x0806604e in main (argc=3, argv=0xbfffeed4) at ../src/main.cpp:314
if(matches[i][0].distance < 0.9*matches[i][1].distance){
