forked from InsightSoftwareConsortium/ITK
-
Notifications
You must be signed in to change notification settings - Fork 0
/
itkLabelVotingImageFilter.txx
156 lines (126 loc) · 4.56 KB
/
itkLabelVotingImageFilter.txx
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
145
146
147
148
149
150
151
152
153
154
155
156
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkLabelVotingImageFilter.txx
Language: C++
Date: $Date$
Version: $Revision$
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 _itkLabelVotingImageFilter_txx
#define _itkLabelVotingImageFilter_txx
#include "itkLabelVotingImageFilter.h"
#include "itkImageRegionIterator.h"
#include "itkImageRegionConstIterator.h"
#include "vnl/vnl_math.h"
namespace itk
{
template <typename TInputImage, typename TOutputImage>
void
LabelVotingImageFilter<TInputImage, TOutputImage>
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
os << indent << "m_HasLabelForUndecidedPixels = "
<< this->m_HasLabelForUndecidedPixels << std::endl;
os << indent << "m_LabelForUndecidedPixels = "
<< this->m_LabelForUndecidedPixels << std::endl;
}
template< typename TInputImage, typename TOutputImage >
typename LabelVotingImageFilter< TInputImage,TOutputImage>::InputPixelType
LabelVotingImageFilter< TInputImage, TOutputImage >
::ComputeMaximumInputValue()
{
InputPixelType maxLabel = 0;
typedef ImageRegionConstIterator< TInputImage > IteratorType;
// Record the number of input files.
const unsigned int numberOfInputFiles = this->GetNumberOfInputs();
for(unsigned int i = 0; i < numberOfInputFiles; ++i)
{
const InputImageType * inputImage = this->GetInput( i );
IteratorType it( inputImage, inputImage->GetBufferedRegion() );
for( it.GoToBegin(); !it.IsAtEnd(); ++it )
{
maxLabel = vnl_math_max( maxLabel, it.Get() );
}
}
return maxLabel;
}
template< typename TInputImage, typename TOutputImage >
void
LabelVotingImageFilter< TInputImage, TOutputImage >
::BeforeThreadedGenerateData ()
{
Superclass::BeforeThreadedGenerateData();
// determine the maximum label in all input images
this->m_TotalLabelCount = this->ComputeMaximumInputValue() + 1;
if ( ! this->m_HasLabelForUndecidedPixels )
{
this->m_LabelForUndecidedPixels = this->m_TotalLabelCount;
}
// Allocate the output image.
typename TOutputImage::Pointer output = this->GetOutput();
output->SetBufferedRegion( output->GetRequestedRegion() );
output->Allocate();
}
template< typename TInputImage, typename TOutputImage >
void
LabelVotingImageFilter< TInputImage, TOutputImage >
::ThreadedGenerateData( const OutputImageRegionType &outputRegionForThread,
int itkNotUsed(threadId))
{
typedef ImageRegionConstIterator< TInputImage > IteratorType;
typedef ImageRegionIterator< TOutputImage> OutIteratorType;
typename TOutputImage::Pointer output = this->GetOutput();
// Record the number of input files.
const unsigned int numberOfInputFiles = this->GetNumberOfInputs();
// create and initialize all input image iterators
IteratorType *it = new IteratorType[numberOfInputFiles];
for ( unsigned int i = 0; i < numberOfInputFiles; ++i)
{
it[i] = IteratorType( this->GetInput( i ),
outputRegionForThread );
}
unsigned int* votesByLabel = new unsigned int[ this->m_TotalLabelCount ];
OutIteratorType out = OutIteratorType( output, outputRegionForThread );
for( out.GoToBegin(); !out.IsAtEnd(); ++out )
{
// reset number of votes per label for all labels
for( InputPixelType l = 0; l < this->m_TotalLabelCount; ++l )
{
votesByLabel[l] = 0;
}
// count number of votes for the labels
for( unsigned int i = 0; i < numberOfInputFiles; ++i)
{
const InputPixelType label = it[i].Get();
++votesByLabel[label];
++(it[i]);
}
// determine the label with the most votes for this pixel
out.Set( 0 );
unsigned int maxVotes = votesByLabel[0];
for( InputPixelType l = 1; l < this->m_TotalLabelCount; ++l )
{
if( votesByLabel[l] > maxVotes )
{
maxVotes = votesByLabel[l];
out.Set( l );
}
else
{
if( votesByLabel[l] == maxVotes )
{
out.Set( this->m_LabelForUndecidedPixels );
}
}
}
}
delete[] it;
delete[] votesByLabel;
}
} // end namespace itk
#endif