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/* -*- mia-c++ -*-
*
* This file is part of MIA - a toolbox for medical image analysis
* Copyright (c) Leipzig, Madrid 1999-2014 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 __vfluid_h
#define __vfluid_h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <memory>
#include <mia/2d/image.hh>
#include <mia/2d/vectorfield.hh>
#include <mia/2d/interpolator.hh>
#include "Pixel.hh"
#define MIN_STEP 0.1
#define MAX_STEP 4.0
#define OMEGA 1.8
#define LAMBDA 1
#define MU 1
#define PDE_NIT 200
#define TEMP_NIT 200
#define THRESH 4
NS_MIA_BEGIN
class TFluidReg {
C2DFVectorfield v; // velocity field
C2DFVectorfield B; // force field
C2DFVectorfield u; // displacement field
C2DFVectorfield r; // perturbation field
C2DFImage Ref;
C2DFImage Model;
C2DFImage Template;
std::shared_ptr<T2DInterpolator<float> > target_interp;
float min_stepsize;
C2DBounds Start,End;
bool final_level;
float epsilon;
float delta; // step size
float stepSize; // step size
float lambda, mu; // elasticity constants
float omega; // overrelaxation factor
float a_,a, b, c, a_b,b_4; // integration constants
float regrid_thresh;
public:
TFluidReg(const C2DFImage& _Ref, const C2DFImage& _Model, float __regrid_thresh, int level,
float __epsilon, float __lambda, float __mu);
~TFluidReg();
float solveAt(unsigned int x, unsigned int y);
void solvePDE(unsigned int nit);
// void solvePDE(C2DFVectorfield& v, const C2DFVectorfield& B, unsigned int nit);
C2DFVector forceAt(const C2DFVector &p, float s);
void calculateForces();
float calculateMismatch(bool apply);
bool decreaseStep();
void increaseStep();
void work(C2DFVectorfield *Shift, const C2DInterpolatorFactory& ipfac);
private:
float perturbationAt(unsigned int x, unsigned int y);
float calculatePerturbation();
float jacobianAt(unsigned int x, unsigned int y);
float calculateJacobian();
};
inline bool TFluidReg::decreaseStep()
{
stepSize *= 0.5;
if (stepSize >= min_stepsize) {
return true;
}else {
stepSize = min_stepsize;
return false;
}
}
inline void TFluidReg::increaseStep()
{
stepSize *= 1.5;
if (stepSize > MAX_STEP)
stepSize = MAX_STEP;
}
#endif
NS_MIA_END
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