transforms.h File Reference

Fourier, Hadamard, Walsh-Hadamard, and 2D Hadamard transforms - header file. More...

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

Go to the source code of this file.

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<class T >
void	itpp::bitrv (Vec< T > &out)
	Bit reverse.

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Detailed Description

Fourier, Hadamard, Walsh-Hadamard, and 2D Hadamard transforms - header file.

Author:

Tony Ottosson, Thomas Eriksson, Simon Wood and Adam Piatyszek

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Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)

This file is part of IT++ - a C++ library of mathematical, signal processing, speech processing, and communications classes and functions.

IT++ is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

IT++ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with IT++. If not, see <http://www.gnu.org/licenses/>.

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