2d/deformer.hh

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/* -*- mia-c++  -*-
 *
 * This file is part of MIA - a toolbox for medical image analysis 
 * Copyright (c) Leipzig, Madrid 1999-2017 Gert Wollny
 *
 * MIA 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.
 *
 * This program 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 MIA; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef mia_2d_deformer_hh
#define mia_2d_deformer_hh

#include <mia/2d/image.hh>
#include <mia/2d/filter.hh>
#include <mia/2d/interpolator.hh>

NS_MIA_BEGIN 


struct FDeformer2D: public TFilter<P2DImage> {
        
        FDeformer2D(const C2DFVectorfield& vf, const C2DInterpolatorFactory& ipfac): 
                m_vf(vf), 
                m_ipfac(ipfac)
                {
                }

        template <typename T> 
        P2DImage operator () (const T2DImage<T>& image) const {
                T2DImage<T> *timage = new T2DImage<T>(image.get_size()); 

                std::shared_ptr<T2DInterpolator<T> >  interp(m_ipfac.create(image.data())); 

                typename T2DImage<T>::iterator r = timage->begin(); 
                C2DFVectorfield::const_iterator v = m_vf.begin(); 

                for (size_t y = 0; y < image.get_size().y; ++y)
                        for (size_t x = 0; x < image.get_size().x; ++x, ++r, ++v) {
                                *r = (*interp)(C2DFVector(x - v->x, y - v->y));
                        }
                return P2DImage(timage); 
        }

        template <typename T> 
        void operator () (const T2DImage<T>& image, T2DImage<T>& result) const {
                assert(image.get_size() == result.get_size()); 

                std::shared_ptr<T2DInterpolator<T> >  interp(m_ipfac.create(image.data())); 

                typename T2DImage<T>::iterator r = result.begin(); 
                C2DFVectorfield::const_iterator v = m_vf.begin(); 

                for (size_t y = 0; y < image.get_size().y; ++y)
                        for (size_t x = 0; x < image.get_size().x; ++x, ++r, ++v) {
                                *r = (*interp)(C2DFVector(x - v->x, y - v->y));
                        }
        }

private: 
        C2DFVectorfield m_vf; 
        C2DInterpolatorFactory m_ipfac; 
}; 

NS_MIA_END

#endif