2022-02-17 19:24:34 +00:00
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/*
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* DWT.hpp, part of LatAnalyze
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*
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* Copyright (C) 2013 - 2020 Antonin Portelli
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*
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* LatAnalyze is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LatAnalyze is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LatAnalyze. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef Latan_DWT_hpp_
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#define Latan_DWT_hpp_
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#include <LatAnalyze/Global.hpp>
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#include <LatAnalyze/Numerical/DWTFilters.hpp>
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BEGIN_LATAN_NAMESPACE
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/******************************************************************************
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* Discrete wavelet transform class *
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******************************************************************************/
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class DWT
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{
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public:
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typedef std::pair<DVec, DVec> DWTLevel;
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public:
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// constructor
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DWT(const DWTFilter &filter);
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// destructor
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virtual ~DWT(void) = default;
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// convolution primitive
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2022-02-18 14:06:52 +00:00
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static void filterConvolution(DVec &out, const DVec &data,
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const std::vector<double> &filter, const Index offset);
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// downsampling/upsampling primitives
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static void downsample(DVec &out, const DVec &in);
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static void upsample(DVec &out, const DVec &in);
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2022-02-17 19:24:34 +00:00
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// DWT
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std::vector<DWTLevel> forward(const DVec &data, const unsigned int level) const;
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DVec backward(const std::vector<DWTLevel>& dwt) const;
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private:
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DWTFilter filter_;
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};
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END_LATAN_NAMESPACE
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#endif // Latan_DWT_hpp_
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