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
|
/*=========================================================================
*
* 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 "itkConvolutionImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
int itkConvolutionImageFilterDeltaFunctionTest(int argc, char * argv[])
{
if ( argc < 3 )
{
std::cout << "Usage: " << argv[0] << " kernelImage outputImage" << std::endl;
return EXIT_FAILURE;
}
const unsigned int ImageDimension = 2;
typedef unsigned char PixelType;
typedef itk::Image< PixelType, ImageDimension > ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
// Read kernel image.
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
reader->Update();
// Set up delta function image.
ImageType::RegionType region = reader->GetOutput()->GetLargestPossibleRegion();
ImageType::Pointer deltaFunctionImage = ImageType::New();
deltaFunctionImage->SetRegions( region );
deltaFunctionImage->Allocate(true); // initialize
// buffer
// to zero
// Set the middle pixel (rounded up) to 1.
ImageType::IndexType middleIndex;
for ( unsigned int i = 0; i < ImageDimension; ++i )
{
ImageType::SizeValueType sizeInDimension = region.GetSize()[i];
middleIndex[i] =
itk::Math::Floor< ImageType::IndexValueType >( 0.5 * sizeInDimension );
}
deltaFunctionImage->SetPixel( middleIndex, 1 );
typedef itk::ConvolutionImageFilter<ImageType> ConvolutionFilterType;
ConvolutionFilterType::Pointer convolver
= ConvolutionFilterType::New();
convolver->SetInput( deltaFunctionImage );
convolver->SetKernelImage( reader->GetOutput() );
typedef itk::ImageFileWriter<ImageType> WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName( argv[2] );
writer->SetInput( convolver->GetOutput() );
try
{
writer->Update();
}
catch ( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
|
