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transforms.h File Reference

Definitions of Fourier, Hadamard, Walsh-Hadamard, and 2D Hadamard transforms. More...

#include <itpp/base/vec.h>
#include <itpp/base/mat.h>

Go to the source code of this file.

Namespaces

namespace  itpp

Functions

void itpp::fft (const cvec &in, cvec &out)
 Fast Fourier Transform.
cvec itpp::fft (const cvec &in)
 Fast Fourier Transform.
cvec itpp::fft (const cvec &in, const int N)
 Fast Fourier Transform, with zero-padding up to size N.
void itpp::ifft (const cvec &in, cvec &out)
 Inverse Fast Fourier Transform.
cvec itpp::ifft (const cvec &in)
 Inverse Fast Fourier Transform.
cvec itpp::ifft (const cvec &in, const int N)
 Inverse Fast Fourier Transform, with zero-padding up to size N.
void itpp::fft_real (const vec &in, cvec &out)
 Real Fast Fourier Transform.
cvec itpp::fft_real (const vec &in)
 Real Fast Fourier Transform.
cvec itpp::fft_real (const vec &in, const int N)
 Real Fast Fourier Transform, with zero-padding up to size N.
void itpp::ifft_real (const cvec &in, vec &out)
 Inverse Real Fast Fourier Transform. Assumes even size.
vec itpp::ifft_real (const cvec &in)
 Inverse Real Fast Fourier Transform. Assumes even size.
vec itpp::ifft_real (const cvec &in, const int N)
 Inverse Real Fast Fourier Transform, with zero-padding up to size N.
void itpp::dct (const vec &in, vec &out)
 Discrete Cosine Transform (DCT).
vec itpp::dct (const vec &in)
 Discrete Cosine Transform (DCT).
void itpp::idct (const vec &in, vec &out)
 Inverse Discrete Cosine Transform (IDCT).
vec itpp::idct (const vec &in)
 Inverse Discrete Cosine Transform (IDCT).
template<class T>
Vec< T > itpp::dht (const Vec< T > &v)
 Fast Hadamard Transform.
template<class T>
void itpp::dht (const Vec< T > &vin, Vec< T > &vout)
 Fast Hadamard Transform.
template<class T>
void itpp::self_dht (Vec< T > &v)
 Fast Hadamard Transform - memory efficient. Stores the result in v.
template<class T>
Vec< T > itpp::dwht (const Vec< T > &v)
 Fast Walsh Hadamard Transform.
template<class T>
void itpp::dwht (const Vec< T > &vin, Vec< T > &vout)
 Fast Walsh Hadamard Transform.
template<class T>
void itpp::self_dwht (Vec< T > &v)
 Fast Walsh Hadamard Transform - memory efficient (result in v).
template<class T>
Mat< T > itpp::dht2 (const Mat< T > &m)
 Fast 2D Hadamard Transform.
template<class T>
Mat< T > itpp::dwht2 (const Mat< T > &m)
 Fast 2D Walsh Hadamard Transform.
template vec itpp::dht (const vec &v)
 Template instantiation of dht.
template cvec itpp::dht (const cvec &v)
 Template instantiation of dht.
template void itpp::dht (const vec &vin, vec &vout)
 Template instantiation of dht.
template void itpp::dht (const cvec &vin, cvec &vout)
 Template instantiation of dht.
template void itpp::self_dht (vec &v)
 Template instantiation of self_dht.
template void itpp::self_dht (cvec &v)
 Template instantiation of self_dht.
template vec itpp::dwht (const vec &v)
 Template instantiation of dwht.
template cvec itpp::dwht (const cvec &v)
 Template instantiation of dwht.
template void itpp::dwht (const vec &vin, vec &vout)
 Template instantiation of dwht.
template void itpp::dwht (const cvec &vin, cvec &vout)
 Template instantiation of dwht.
template void itpp::self_dwht (vec &v)
 Template instantiation of self_dwht.
template void itpp::self_dwht (cvec &v)
 Template instantiation of self_dwht.
template mat itpp::dht2 (const mat &m)
 Template instantiation of dht2.
template cmat itpp::dht2 (const cmat &m)
 Template instantiation of dht2.
template mat itpp::dwht2 (const mat &m)
 Template instantiation of dht2.
template cmat itpp::dwht2 (const cmat &m)
 Template instantiation of dht2.


Detailed Description

Definitions of Fourier, Hadamard, Walsh-Hadamard, and 2D Hadamard transforms.

Author:
Tony Ottosson, Thomas Eriksson, Simon Wood and Adam Piatyszek
Date
2006-08-03 20:33:12 +0200 (czw, 03 sie 2006)
Revision
574

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IT++ - C++ library of mathematical, signal processing, speech processing, and communications classes and functions

Copyright (C) 1995-2006 (see AUTHORS file for a list of contributors)

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This file uses the FFTW package version 3.0.x that is distributed under the GNU GPL licence. For details see http://www.fftw.org/.

Definition in file transforms.h.

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