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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*=========================================================================
*
* 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 itkImageRegionExclusionConstIteratorWithIndex_hxx
#define itkImageRegionExclusionConstIteratorWithIndex_hxx
namespace itk
{
template <typename TImage>
ImageRegionExclusionConstIteratorWithIndex<TImage>::ImageRegionExclusionConstIteratorWithIndex(
const ImageType * ptr,
const RegionType & region)
: Superclass(ptr, region)
{}
template <typename TImage>
ImageRegionExclusionConstIteratorWithIndex<TImage>::ImageRegionExclusionConstIteratorWithIndex(const Superclass & it)
{
Superclass::operator=(it);
}
//----------------------------------------------------------------------
// Set the region to exclude from the walk
//----------------------------------------------------------------------
template <typename TImage>
void
ImageRegionExclusionConstIteratorWithIndex<TImage>::SetExclusionRegion(const RegionType & region)
{
// Crop the exclusion region so that it lies entirely within the
// iterator region.
m_ExclusionRegion = region;
m_ExclusionRegion.Crop(this->m_Region);
m_ExclusionBegin = m_ExclusionRegion.GetIndex();
SizeType exclusionSize = m_ExclusionRegion.GetSize();
for (unsigned int i = 0; i < TImage::ImageDimension; ++i)
{
m_ExclusionEnd[i] = m_ExclusionBegin[i] + exclusionSize[i];
}
}
//----------------------------------------------------------------------
// Set the region to exclude from the walk to a region that is inset
// one pixel from the boundary of the region
//----------------------------------------------------------------------
template <typename TImage>
void
ImageRegionExclusionConstIteratorWithIndex<TImage>::SetExclusionRegionToInsetRegion()
{
RegionType excludeRegion;
excludeRegion = this->m_Region;
for (unsigned int i = 0; i < TImage::ImageDimension; ++i)
{
if (excludeRegion.GetSize()[i] >= 2)
{
// region is large enough to inset, adjust size and index
excludeRegion.SetSize(i, excludeRegion.GetSize()[i] - 2);
excludeRegion.SetIndex(i, excludeRegion.GetIndex()[i] + 1);
}
else
{
// region is not large enough to inset, set exclusion size to
// zero and keep the index the same.
excludeRegion.SetSize(i, 0);
}
}
this->SetExclusionRegion(excludeRegion);
}
//----------------------------------------------------------------------
// Move to beginning of region
//----------------------------------------------------------------------
template <typename TImage>
void
ImageRegionExclusionConstIteratorWithIndex<TImage>::GoToBegin()
{
// Check whether exclusion region covers the entire region
if (m_ExclusionRegion == this->m_Region)
{
this->m_Position = this->m_End;
this->m_Remaining = false;
return;
}
this->Superclass::GoToBegin();
// If inside the exclusion region to begin with, jump past it.
for (unsigned int in = 0; in < TImage::ImageDimension; ++in)
{
if (m_ExclusionRegion.IsInside(this->m_PositionIndex))
{
if (m_ExclusionRegion.GetSize()[in] == this->m_Region.GetSize()[in])
{
this->m_PositionIndex[in] = this->m_BeginIndex[in];
}
else
{
this->m_PositionIndex[in] = m_ExclusionEnd[in];
this->m_Position += this->m_OffsetTable[in] * m_ExclusionRegion.GetSize()[in];
}
}
}
}
//----------------------------------------------------------------------
// Move to the end of the region
//----------------------------------------------------------------------
template <typename TImage>
void
ImageRegionExclusionConstIteratorWithIndex<TImage>::GoToReverseBegin()
{
// Check whether exclusion region covers the entire region
if (m_ExclusionRegion == this->m_Region)
{
this->m_Position = this->m_End;
this->m_Remaining = false;
return;
}
this->Superclass::GoToReverseBegin();
// If inside the exclusion region to begin with, jump past it.
for (unsigned int in = 0; in < TImage::ImageDimension; ++in)
{
if (m_ExclusionRegion.IsInside(this->m_PositionIndex))
{
if (m_ExclusionRegion.GetSize()[in] == this->m_Region.GetSize()[in])
{
// The line will be skipped entirely.
this->m_PositionIndex[in] = this->m_EndIndex[in] - 1;
}
else
{
this->m_PositionIndex[in] = m_ExclusionBegin[in] - 1;
this->m_Position -= this->m_OffsetTable[in] * m_ExclusionRegion.GetSize()[in];
}
}
}
}
//----------------------------------------------------------------------
// Advance along the line, skipping the exclusion region
//----------------------------------------------------------------------
template <typename TImage>
ImageRegionExclusionConstIteratorWithIndex<TImage> &
ImageRegionExclusionConstIteratorWithIndex<TImage>::operator++()
{
this->Superclass::operator++();
while (m_ExclusionRegion.IsInside(this->m_PositionIndex) && this->m_Remaining)
{
// Entered the exclusion region, so jump across it
this->m_Position += this->m_OffsetTable[0] * (static_cast<OffsetValueType>(m_ExclusionRegion.GetSize()[0]));
this->m_PositionIndex[0] = m_ExclusionEnd[0];
if (this->m_PositionIndex[0] == this->m_EndIndex[0])
{
this->m_Position -= this->m_OffsetTable[0];
this->Superclass::operator++();
}
}
return *this;
}
//----------------------------------------------------------------------
// Advance along the line in reverse direction, skipping exclusion region
//----------------------------------------------------------------------
template <typename TImage>
ImageRegionExclusionConstIteratorWithIndex<TImage> &
ImageRegionExclusionConstIteratorWithIndex<TImage>::operator--()
{
this->Superclass::operator--();
while (m_ExclusionRegion.IsInside(this->m_PositionIndex) && this->m_Remaining)
{
// Entered the exclusion region, so jump across it
this->m_Position -= this->m_OffsetTable[0] * (static_cast<OffsetValueType>(m_ExclusionRegion.GetSize()[0]));
this->m_PositionIndex[0] = m_ExclusionBegin[0] - 1;
if (this->m_PositionIndex[0] < this->m_BeginIndex[0])
{
this->m_Position += this->m_OffsetTable[0];
this->Superclass::operator--();
}
}
return *this;
}
} // end namespace itk
#endif
|
