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
|
/*=========================================================================
*
* 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.
*
*=========================================================================*/
#include <fstream>
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkTestingMacros.h"
int
itkImageFileWriterPastingTest1(int argc, char * argv[])
{
if (argc < 3)
{
std::cerr << "Missing parameters." << std::endl;
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv);
std::cerr << " input output" << std::endl;
return EXIT_FAILURE;
}
// We remove the output file
itksys::SystemTools::RemoveFile(argv[2]);
using PixelType = unsigned char;
using ImageType = itk::Image<PixelType, 3>;
using ReaderType = itk::ImageFileReader<ImageType>;
using WriterType = itk::ImageFileWriter<ImageType>;
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
reader->SetUseStreaming(true);
ImageType::RegionType region;
ImageType::SizeType size;
ImageType::SizeType fullsize;
ImageType::IndexType index;
unsigned int m_NumberOfPieces = 10;
// We decide how we want to read the image and we split accordingly
// The image is read slice by slice
reader->UpdateOutputInformation();
fullsize = reader->GetOutput()->GetLargestPossibleRegion().GetSize();
index.Fill(0);
size[0] = fullsize[0];
size[1] = fullsize[1];
size[2] = 0;
unsigned int zsize = fullsize[2] / m_NumberOfPieces;
// Setup the writer
auto writer = WriterType::New();
writer->SetFileName(argv[2]);
for (unsigned int i = 0; i < m_NumberOfPieces; ++i)
{
std::cout << "Reading piece " << i + 1 << " of " << m_NumberOfPieces << std::endl;
index[2] += size[2];
// At the end we need to adjust the size to make sure
// we are reading everything
if (i == m_NumberOfPieces - 1)
{
size[2] = fullsize[2] - index[2];
}
else
{
size[2] = zsize;
}
region.SetIndex(index);
region.SetSize(size);
// Write the image
itk::ImageIORegion ioregion(3);
itk::ImageIORegionAdaptor<ImageType::ImageDimension>::Convert(
region, ioregion, reader->GetOutput()->GetLargestPossibleRegion().GetIndex());
writer->SetIORegion(ioregion);
writer->SetInput(reader->GetOutput());
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
} // end for pieces
return EXIT_SUCCESS;
}
|
