Examples with LocalitySensitiveHashFunction de.lmu.ifi.dbs.elki.index.lsh.hashfunctions.LocalitySensitiveHashFunction used on opensource projects

Example 1 with LocalitySensitiveHashFunction

use of de.lmu.ifi.dbs.elki.index.lsh.hashfunctions.LocalitySensitiveHashFunction in project elki by elki-project.

the class AbstractProjectedHashFunctionFamily method generateHashFunctions.

@Override
public ArrayList<? extends LocalitySensitiveHashFunction<? super NumberVector>> generateHashFunctions(Relation<? extends NumberVector> relation, int l) {
    int dim = RelationUtil.dimensionality(relation);
    ArrayList<LocalitySensitiveHashFunction<? super NumberVector>> ps = new ArrayList<>(l);
    final Random rnd = random.getSingleThreadedRandom();
    for (int i = 0; i < l; i++) {
        RandomProjectionFamily.Projection mat = proj.generateProjection(dim, k);
        ps.add(new MultipleProjectionsLocalitySensitiveHashFunction(mat, width, rnd));
    }
    return ps;
}

Example 2 with LocalitySensitiveHashFunction

use of de.lmu.ifi.dbs.elki.index.lsh.hashfunctions.LocalitySensitiveHashFunction in project elki by elki-project.

the class CosineHashFunctionFamily method generateHashFunctions.

@Override
public ArrayList<? extends LocalitySensitiveHashFunction<? super NumberVector>> generateHashFunctions(Relation<? extends NumberVector> relation, int l) {
    int dim = RelationUtil.dimensionality(relation);
    ArrayList<LocalitySensitiveHashFunction<? super NumberVector>> ps = new ArrayList<>(l);
    for (int i = 0; i < l; i++) {
        RandomProjectionFamily.Projection projection = proj.generateProjection(dim, k);
        ps.add(new CosineLocalitySensitiveHashFunction(projection));
    }
    return ps;
}