LocalitySensitiveHashFunction (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

Type Parameters:

V - Data type to hash.

All Known Implementing Classes:

CosineLocalitySensitiveHashFunction, MultipleProjectionsLocalitySensitiveHashFunction
```
public interface LocalitySensitiveHashFunction<V>
```
Hash functions as used by locality sensitive hashing.

Since:

0.6.0

Author:

Erich Schubert

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getNumberOfProjections()`	Get the number of projections performed.
`int`	`hashObject(V obj)`	Compute the hash value of an object.
`int`	`hashObject(V obj, double[] buf)`	Compute the hash value of an object (faster version).

- Method Detail
  - hashObject
```
int hashObject(V obj)
```
    Compute the hash value of an object.
    
    Parameters:
    
    obj - Object to hash
    
    Returns:
    
    Hash value
  - hashObject
```
int hashObject(V obj,
               double[] buf)
```
    Compute the hash value of an object (faster version).
    
    Parameters:
    
    obj - Object to hash
    
    buf - Buffer, sized according to the number of projections.
    
    Returns:
    
    Hash value
  - getNumberOfProjections
```
int getNumberOfProjections()
```
    Get the number of projections performed.
    
    Returns:
    
    Number of projections.