void testSaveAndLoad(Mat descriptors, string outputFile) { vector<string> images;
flann::LshIndexParams lshIndexParams(20,10,2);
flann::Index kdtree(descriptors, lshIndexParams, cvflann::FLANN_DIST_HAMMING);
cout << "outputting index file to disk: " << "\n";
// just to check whether loaded ones are same or similar
writeMatToFile(descriptors, "before_save.dat");
kdtree.save(outputFile);
// saving done .. now load
Mat mat = Mat(descriptors.rows, descriptors.cols, CV_8UC1);
// read saved indices
flann::Index kdtree1(mat,
flann::SavedIndexParams(outputFile), cvflann::FLANN_DIST_HAMMING);
writeMatToFile(mat, "after_save.dat");
cout << "Loaded mat of size " << mat.rows << " " << mat.cols << "\n";
// prepare to output indices and distances
Mat indices = Mat(descriptors.rows, 2, CV_32S);
Mat dists = Mat(descriptors.rows, 2, CV_32S);
kdtree1.knnSearch(descriptors, indices, dists, 2);
}
before_save.dat:
%YAML:1.0
mat: !!opencv-matrix
rows: 6342
cols: 61
dt: u
data: [ 1, 0, 140, 7, 1, 238, 55, 0, 0, 0, 0, 0, 0, 0, 0, 128, 25,
122, 134, 6, 0, 0, 240, 248, 227, 1, 3, 227, 249, 255, 62, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 24, 0, 0, 128, 48, 230, 15, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 128, 25, 59, 243, 51, 6, 16, 64, 252, 255, 199, 16, 255,
7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 6, 0, 60, 0, 0, 0, 0, 0, 0,
0, 0, 192, 14, 160, 3, 112, 0, 7, 16, 0, 0, 0, 0, 0, 0, 254, 63,
.........
after_save.dat:
%YAML:1.0
mat: !!opencv-matrix
rows: 6342
cols: 61
dt: u
data: [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
.......
And knnSearch throws segfaults during the matching.
Thanks
