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
|
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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
*
* http://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.
*
*=========================================================================*/
#include <iostream>
#include "itkShrinkImageFilter.h"
#include "itkStreamingImageFilter.h"
#include "itkImageRegionMultidimensionalSplitter.h"
#include "itkXMLFileOutputWindow.h"
#include "itkPipelineMonitorImageFilter.h"
int itkStreamingImageFilterTest2(int, char* [] )
{
const unsigned int numberOfStreamDivisions = 25;
itk::XMLFileOutputWindow::Pointer logger = itk::XMLFileOutputWindow::New();
logger->SetInstance(logger);
// typedefs to simplify the syntax
typedef itk::Image<short, 2> ShortImage;
// Test the creation of an image with native type
ShortImage::Pointer if2 = ShortImage::New();
// fill in an image
ShortImage::IndexType index = {{0, 0}};
ShortImage::SizeType size = {{42, 64}};
ShortImage::RegionType region;
region.SetSize( size );
region.SetIndex( index );
if2->SetLargestPossibleRegion( region );
if2->SetBufferedRegion( region );
if2->Allocate();
itk::ImageRegionIterator<ShortImage> iterator(if2, region);
short i=0;
short scalar;
for (; !iterator.IsAtEnd(); ++iterator, ++i)
{
scalar = i;
iterator.Set( scalar );
}
// Create a filter
itk::ShrinkImageFilter< ShortImage, ShortImage >::Pointer shrink;
shrink = itk::ShrinkImageFilter< ShortImage, ShortImage >::New();
shrink->SetInput( if2 );
unsigned int factors[2] = { 2, 3 };
shrink->SetShrinkFactors(factors);
shrink->DebugOn();
itk::ImageRegionMultidimensionalSplitter<2>::Pointer splitter;
splitter = itk::ImageRegionMultidimensionalSplitter<2>::New();
splitter->DebugOn();
// monitor what's going on
itk::PipelineMonitorImageFilter<ShortImage>::Pointer monitor;
monitor = itk::PipelineMonitorImageFilter<ShortImage>::New();
monitor->SetInput( shrink->GetOutput() );
itk::StreamingImageFilter<ShortImage, ShortImage>::Pointer streamer;
streamer = itk::StreamingImageFilter<ShortImage, ShortImage>::New();
streamer->SetInput( monitor->GetOutput() );
streamer->SetNumberOfStreamDivisions( numberOfStreamDivisions );
streamer->SetRegionSplitter( splitter );
streamer->Update();
std::cout << "Input spacing: " << if2->GetSpacing()[0] << ", "
<< if2->GetSpacing()[1] << std::endl;
std::cout << "Output spacing: " << streamer->GetOutput()->GetSpacing()[0]
<< ", "
<< streamer->GetOutput()->GetSpacing()[1] << std::endl;
// check if the pipeline executed as expected
if (monitor->GetNumberOfUpdates() != numberOfStreamDivisions ||
monitor->GetOutputRequestedRegions().size() != numberOfStreamDivisions)
{
std::cout << monitor;
std::cout << "ImageStreaming Filter test failed because pipeline didn't execute as expected." << std::endl;
return EXIT_FAILURE;
}
//
// The rest of this code determines whether the shrink code produced
// the image we expected.
//
ShortImage::RegionType requestedRegion;
requestedRegion = streamer->GetOutput()->GetRequestedRegion();
itk::ImageRegionIterator<ShortImage>
iterator2(streamer->GetOutput(), requestedRegion);
// If size is not a multiple of the shrink factors, then adjust the
// row/col indices
short rowOffset = 0;
short colOffset = 0;
if (region.GetSize()[1] % shrink->GetShrinkFactors()[1])
{
rowOffset = static_cast<short>(
region.GetSize()[1] / 2.0 -
((region.GetSize()[1] / shrink->GetShrinkFactors()[1]) / 2.0 *
shrink->GetShrinkFactors()[1])
);
}
if (region.GetSize()[0] % shrink->GetShrinkFactors()[0])
{
colOffset = static_cast<short>(
region.GetSize()[0] / 2.0 -
((region.GetSize()[0] / shrink->GetShrinkFactors()[0]) / 2.0 *
shrink->GetShrinkFactors()[0])
);
}
bool passed = true;
for (; !iterator2.IsAtEnd(); ++iterator2)
{
short col = itk::Math::RoundHalfIntegerUp<short>( static_cast<float> (shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0] +
(shrink->GetShrinkFactors()[0] ) / 2.0 ) );
col += colOffset;
short row = itk::Math::RoundHalfIntegerUp<short>( static_cast<float> (shrink->GetShrinkFactors()[1] * iterator2.GetIndex()[1] +
(shrink->GetShrinkFactors()[1] ) / 2.0 ) );
row += rowOffset;
short trueValue = col + region.GetSize()[0] * row;
if ( iterator2.Get() != trueValue )
{
passed = false;
std::cout << "Pixel " << iterator2.GetIndex()
<< " expected " << trueValue
<< " but got " << iterator2.Get()
<< std::endl;
}
}
if (passed)
{
std::cout << "ImageStreamingFilter test passed." << std::endl;
try
{
return EXIT_SUCCESS;
}
catch (...)
{
std::cout << "Caught an exception on exit" << std::endl;
return EXIT_FAILURE;
}
}
else
{
std::cout << "ImageStreaming Filter test failed." << std::endl;
return EXIT_FAILURE;
}
}
|
