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
|
/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkStreamingImageFilterTest2.cxx,v $
Language: C++
Date: $Date: 2003-09-10 14:30:08 $
Version: $Revision: 1.7 $
Copyright (c) Insight Software 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.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include <iostream>
#include "itkImage.h"
#include "itkImageRegionIterator.h"
#include "itkShrinkImageFilter.h"
#include "itkStreamingImageFilter.h"
#include "itkImageRegionMultidimensionalSplitter.h"
#include "itkXMLFileOutputWindow.h"
int itkStreamingImageFilterTest2(int, char* [] )
{
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, 63}};
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();
itk::StreamingImageFilter<ShortImage, ShortImage>::Pointer streamer;
streamer = itk::StreamingImageFilter<ShortImage, ShortImage>::New();
streamer->SetInput( shrink->GetOutput() );
streamer->SetNumberOfStreamDivisions( 25 );
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;
//
// 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);
bool passed = true;
for (; !iterator2.IsAtEnd(); ++iterator2)
{
short trueValue = (short) (shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0])
+ (region.GetSize()[0]
* shrink->GetShrinkFactors()[1] * iterator2.GetIndex()[1]);
if ( iterator2.Get() != trueValue )
{
passed = false;
std::cout << "Pixel " << iterator2.GetIndex() << " is incorrect" << 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;
}
}
|
