/usr/include/mia-2.2/mia/core/scaler1d.hh is in libmia-2.2-dev 2.2.2-1+b1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /* -*- 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 mia_core_scale1d_hh
#define mia_core_scale1d_hh
#include <cassert>
#include <vector>
#include <memory>
#include <mia/core/vector.hh>
#include <mia/core/msgstream.hh>
#include <mia/core/interpolator1d.hh>
#include <mia/core/spacial_kernel.hh>
NS_MIA_BEGIN
/**
\ingroup interpol
\brief A class for general scaling of one-dimensional arrays.
Class for general scaling of one-dimensional arrays. kernels are the separable B-spline
functions. For upscaling, an interpolator is created by using the provided interpolator factory.
Downscaling is done solving an overdetermined linear system of equations Ax = y. At construction
time the matrix A is QR decomposed, and later the downscaling is done by solving QRx=y
\todo see if scaling can be expressed by a filter
\todo seems like downscaling isn't done properly
*/
class EXPORT_CORE C1DScalar {
public:
typedef std::vector<double> std_double_vector;
/**
Create the scaler prividing the given interpolator kernel.
\param kernel interpolation kernel
\param in_size
\param out_size the input will be scaled to the given size, the scale is set accordingly
*/
C1DScalar(const CSplineKernel& kernel, size_t in_size, size_t out_size);
/**
Create the scaler providing the given interpolator kernel.
\param kernel interpolation kernel
\param in_size
\param scale factor by which tho scale the input size, the interpolation will be
exact with respect to the scale
*/
C1DScalar(const CSplineKernel& kernel, size_t in_size, double scale);
/**
Scaling operator.
\param input input data
\param[out] output when calling the function, the size of this vector must be set to the requested
size. The path for down or upscaling is automatically selected.
*/
void operator () (const std_double_vector& input, std_double_vector& output) const;
/**
Alternate interface for scaling. Here the input data has to be copied into
the pre-acclocated memory by using the \a input_begin() and \a input_end() iterators,
and the result can be read using the \a output_begin(), \a output_end() iterators.
*/
void run();
/// \returns begin iterator of the input buffer
std_double_vector::iterator input_begin();
/// \returns end iterator of the input buffer
std_double_vector::iterator input_end();
/// \returns begin iterator of the output buffer
std_double_vector::iterator output_begin();
/// \returns end iterator of the output buffer
std_double_vector::iterator output_end();
/// \returns the size of the output vector
size_t get_output_size() const;
private:
void initialize(const CSplineKernel& kernel);
void upscale(const std_double_vector& input, std_double_vector& output) const;
void downscale(const std_double_vector& input, std_double_vector& output) const;
enum EStrategy {
scs_fill_output,
scs_upscale,
scs_copy,
scs_downscale,
scs_unknown
};
size_t m_in_size;
size_t m_support;
double m_scale;
std::vector<double> m_poles;
EStrategy m_strategy;
PSplineBoundaryCondition m_bc;
std_double_vector m_input_buffer;
size_t m_out_size;
std_double_vector m_output_buffer;
std::vector<CSplineKernel::VWeight> m_weights;
std::vector<CSplineKernel::VIndex> m_indices;
P1DSpacialKernel m_gauss;
};
NS_MIA_END
#endif
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