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
|
/*=========================================================================
*
* 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.
*
*=========================================================================*/
// Software Guide : BeginLatex
//
// This example illustrates how to convert an ITK Image into a PointSet.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkImage.h"
#include "itkPointSet.h"
#include "itkImageRegionConstIterator.h"
int
main(int argc, char * argv[])
{
// Verify the number of parameters in the command line
if (argc < 2)
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " inputImageFile " << std::endl;
return EXIT_FAILURE;
}
using PixelType = unsigned char;
constexpr unsigned int Dimension = 2;
using ImageType = itk::Image<PixelType, Dimension>;
using PointSetType = itk::PointSet<PixelType, Dimension>;
using ReaderType = itk::ImageFileReader<ImageType>;
auto reader = ReaderType::New();
const char * inputFilename = argv[1];
reader->SetFileName(inputFilename);
try
{
reader->Update();
}
catch (const itk::ExceptionObject & err)
{
std::cout << "ExceptionObject caught !" << std::endl;
std::cout << err << std::endl;
return EXIT_FAILURE;
}
auto pointSet = PointSetType::New();
using IteratorType = itk::ImageRegionConstIterator<ImageType>;
const ImageType * image = reader->GetOutput();
IteratorType it(image, image->GetBufferedRegion());
it.GoToBegin();
using PointType = PointSetType::PointType;
PointType point;
unsigned long pointId = 0;
while (!it.IsAtEnd())
{
// Convert the pixel position into a Point
image->TransformIndexToPhysicalPoint(it.GetIndex(), point);
pointSet->SetPoint(pointId, point);
// Transfer the pixel data to the value associated with the point.
pointSet->SetPointData(pointId, it.Get());
++it;
++pointId;
}
std::cout << "Number Of Points = ";
std::cout << pointSet->GetNumberOfPoints() << std::endl;
// Software Guide : EndCodeSnippet
return EXIT_SUCCESS;
}
|
