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
134
135
136
137
138
139
140
141
142
143
144
|
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkFFTWRealToComplexConjugateImageFilter.txx,v $
Language: C++
Date: $Date: 2006-12-31 14:07:10 $
Version: $Revision: 1.11 $
Copyright (c) 2002 Insight Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkFFTWRealToComplexConjugateImageFilter_txx
#define __itkFFTWRealToComplexConjugateImageFilter_txx
#include "itkFFTWRealToComplexConjugateImageFilter.h"
#include "itkFFTRealToComplexConjugateImageFilter.txx"
#include <iostream>
#include "itkIndent.h"
#include "itkMetaDataObject.h"
namespace itk
{
/** TODO: There should be compile time type checks so that
if only USE_FFTWF is defined, then only floats are valid.
and if USE_FFTWD is defined, then only doubles are valid.
*/
template <typename TPixel, unsigned int Dimension>
void
FFTWRealToComplexConjugateImageFilter<TPixel,Dimension>::
GenerateData()
{
// get pointers to the input and output
typename TInputImageType::ConstPointer inputPtr = this->GetInput();
typename TOutputImageType::Pointer outputPtr = this->GetOutput();
if ( !inputPtr || !outputPtr )
{
return;
}
// allocate output buffer memory
outputPtr->SetBufferedRegion( outputPtr->GetRequestedRegion() );
outputPtr->Allocate();
const typename TInputImageType::SizeType& inputSize
= inputPtr->GetLargestPossibleRegion().GetSize();
const typename TOutputImageType::SizeType& outputSize
= outputPtr->GetLargestPossibleRegion().GetSize();
// figure out sizes
// size of input and output aren't the same which is handled in the superclass,
// sort of.
// the input size and output size only differ in the fastest moving dimension
unsigned int total_inputSize = 1;
unsigned int total_outputSize = 1;
for(unsigned i = 0; i < Dimension; i++)
{
total_inputSize *= inputSize[i];
total_outputSize *= outputSize[i];
}
if(this->m_PlanComputed) // if we've already computed a plan
{
// if the image sizes aren't the same,
// we have to compute the plan again
if(this->m_LastImageSize != total_inputSize)
{
delete [] this->m_InputBuffer;
delete [] this->m_OutputBuffer;
FFTWProxyType::DestroyPlan(this->m_Plan);
this->m_PlanComputed = false;
}
}
if(!this->m_PlanComputed)
{
this->m_InputBuffer = new TPixel[total_inputSize];
this->m_OutputBuffer =
new typename FFTWProxyType::ComplexType[total_outputSize];
this->m_LastImageSize = total_inputSize;
switch(Dimension)
{
case 1:
this->m_Plan = FFTWProxyType::Plan_dft_r2c_1d(inputSize[0],
this->m_InputBuffer,
this->m_OutputBuffer,
FFTW_ESTIMATE);
break;
case 2:
this->m_Plan = FFTWProxyType::Plan_dft_r2c_2d(inputSize[1],
inputSize[0],
this->m_InputBuffer,
this->m_OutputBuffer,
FFTW_ESTIMATE);
break;
case 3:
this->m_Plan = FFTWProxyType::Plan_dft_r2c_3d(inputSize[2],
inputSize[1],
inputSize[0],
this->m_InputBuffer,
this->m_OutputBuffer,
FFTW_ESTIMATE);
break;
default:
int *sizes = new int[Dimension];
for(unsigned int i = 0; i < Dimension; i++)
{
sizes[(Dimension - 1) - i] = inputSize[i];
}
this->m_Plan = FFTWProxyType::Plan_dft_r2c(Dimension,sizes,
this->m_InputBuffer,
this->m_OutputBuffer,
FFTW_ESTIMATE);
delete [] sizes;
}
this->m_PlanComputed = true;
}
memcpy(this->m_InputBuffer,
inputPtr->GetBufferPointer(),
total_inputSize * sizeof(TPixel));
FFTWProxyType::Execute(this->m_Plan);
memcpy(outputPtr->GetBufferPointer(),
this->m_OutputBuffer,
total_outputSize * sizeof(typename FFTWProxyType::ComplexType));
}
template <typename TPixel,unsigned int Dimension>
bool
FFTWRealToComplexConjugateImageFilter<TPixel,Dimension>::
FullMatrix()
{
return false;
}
} // namespace itk
#endif //_itkFFTWRealToComplexConjugateImageFilter_txx
|
