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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkVotingBinaryHoleFillingImageFilter_hxx
#define itkVotingBinaryHoleFillingImageFilter_hxx
#include "itkConstNeighborhoodIterator.h"
#include "itkNeighborhoodInnerProduct.h"
#include "itkImageRegionIterator.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkProgressReporter.h"
#include <vector>
#include <algorithm>
namespace itk
{
template <typename TInputImage, typename TOutputImage>
VotingBinaryHoleFillingImageFilter<TInputImage, TOutputImage>::VotingBinaryHoleFillingImageFilter()
{
this->SetSurvivalThreshold(0);
this->m_MajorityThreshold = 1;
this->m_NumberOfPixelsChanged = 0;
this->DynamicMultiThreadingOff();
}
template <typename TInputImage, typename TOutputImage>
void
VotingBinaryHoleFillingImageFilter<TInputImage, TOutputImage>::BeforeThreadedGenerateData()
{
unsigned int threshold = 1;
InputSizeType radius = this->GetRadius();
for (unsigned int i = 0; i < InputImageDimension; ++i)
{
threshold *= (2 * radius[i] + 1);
}
// remove central pixel and take 50%
threshold = static_cast<unsigned int>((threshold - 1) / 2.0);
// add the majority threshold.
threshold += this->GetMajorityThreshold();
this->SetBirthThreshold(threshold);
this->SetSurvivalThreshold(0);
this->m_NumberOfPixelsChanged = 0;
unsigned int numberOfWorkUnits = this->GetNumberOfWorkUnits();
this->m_Count.SetSize(numberOfWorkUnits);
for (unsigned int i = 0; i < numberOfWorkUnits; ++i)
{
this->m_Count[i] = 0;
}
}
template <typename TInputImage, typename TOutputImage>
void
VotingBinaryHoleFillingImageFilter<TInputImage, TOutputImage>::ThreadedGenerateData(
const OutputImageRegionType & outputRegionForThread,
ThreadIdType threadId)
{
ZeroFluxNeumannBoundaryCondition<InputImageType> nbc;
ConstNeighborhoodIterator<InputImageType> bit;
ImageRegionIterator<OutputImageType> it;
// Allocate output
typename OutputImageType::Pointer output = this->GetOutput();
typename InputImageType::ConstPointer input = this->GetInput();
// Find the data-set boundary "faces"
NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<InputImageType> bC;
typename NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<InputImageType>::FaceListType faceList =
bC(input, outputRegionForThread, this->GetRadius());
ProgressReporter progress(this, threadId, outputRegionForThread.GetNumberOfPixels());
const InputPixelType backgroundValue = this->GetBackgroundValue();
const InputPixelType foregroundValue = this->GetForegroundValue();
const auto birthThreshold = static_cast<unsigned int>(this->GetBirthThreshold());
unsigned int numberOfPixelsChanged = 0;
// Process each of the boundary faces. These are N-d regions which border
// the edge of the buffer.
for (const auto & face : faceList)
{
bit = ConstNeighborhoodIterator<InputImageType>(this->GetRadius(), input, face);
it = ImageRegionIterator<OutputImageType>(output, face);
bit.OverrideBoundaryCondition(&nbc);
bit.GoToBegin();
unsigned int neighborhoodSize = bit.Size();
while (!bit.IsAtEnd())
{
const InputPixelType inpixel = bit.GetCenterPixel();
if (inpixel == backgroundValue)
{
// count the pixels ON in the neighborhood
unsigned int count = 0;
for (unsigned int i = 0; i < neighborhoodSize; ++i)
{
InputPixelType value = bit.GetPixel(i);
if (value == foregroundValue)
{
++count;
}
}
if (count >= birthThreshold)
{
it.Set(static_cast<OutputPixelType>(foregroundValue));
++numberOfPixelsChanged;
}
else
{
it.Set(static_cast<OutputPixelType>(backgroundValue));
}
}
else
{
it.Set(static_cast<OutputPixelType>(foregroundValue));
}
++bit;
++it;
progress.CompletedPixel();
}
}
this->m_Count[threadId] = numberOfPixelsChanged;
}
template <typename TInputImage, typename TOutputImage>
void
VotingBinaryHoleFillingImageFilter<TInputImage, TOutputImage>::AfterThreadedGenerateData()
{
this->m_NumberOfPixelsChanged = SizeValueType{};
unsigned int numberOfWorkUnits = this->GetNumberOfWorkUnits();
this->m_Count.SetSize(numberOfWorkUnits);
for (unsigned int t = 0; t < numberOfWorkUnits; ++t)
{
this->m_NumberOfPixelsChanged += this->m_Count[t];
}
}
template <typename TInputImage, typename TOutput>
void
VotingBinaryHoleFillingImageFilter<TInputImage, TOutput>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Majority Threshold : " << m_MajorityThreshold << std::endl;
os << indent << "Number of Pixels Changed : " << m_NumberOfPixelsChanged << std::endl;
}
} // end namespace itk
#endif
|
