fisher.c File Reference

Fisher - Declaration. More...

#include "fisher.h"
#include "gmm.h"
#include "mathop.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Functions
void	vl_fisher_encode (void *enc, vl_type dataType, void const *means, vl_size dimension, vl_size numClusters, void const *covariances, void const *priors, void const *data, vl_size numData, int flags)
	Fisher vector encoding of a set of vectors.

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Detailed Description

Author:

David Novotny

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Function Documentation

void vl_fisher_encode	(	void *	enc,
		vl_type	dataType,
		void const *	means,
		vl_size	dimension,
		vl_size	numClusters,
		void const *	covariances,
		void const *	priors,
		void const *	data,
		vl_size	numData,
		int	flags
	)

Parameters:

dataType	the type of the input data (VL_TYPE_DOUBLE or VL_TYPE_FLOAT).
enc	Fisher vector (output).
means	Gaussian mixture means.
dimension	dimension of the data.
numClusters	number of Gaussians mixture components.
covariances	Gaussian mixture diagonal covariances.
priors	Gaussian mixture prior probabilities.
data	vectors to encode.
numData	number of vectors to encode.
flags	options.

means and covariances have dimension rows and numCluster columns. priors is a vector of size numCluster. data has dimension rows and numData columns. enc is a vecotr of size equal to twice the product of dimension and numClusters. All these vectors and matrices have the same class, as specified by dataType.

flag can be used to control several options: VL_FISHER_FLAG_SQUARE_ROOT, VL_FISHER_FLAG_NORMALIZED, VL_FISHER_FLAG_IMPROVED.

See also:

Fisher Vector encoding (FV)