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
|
/*=========================================================================
*
* 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.
*
*=========================================================================*/
// Author : Ivan Macia (imacia@vicomtech.org)
// Date : 02/01/2009
// VICOMTech, Spain
// http://www.vicomtech.org
// Description : calculates the gaussian derivatives at non-zero
// points of a gaussian input image. For derivative calculation the class
// itkDiscreteGaussianDerivativeImageFilter is used. This example operates on 2D images.
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkDiscreteGaussianDerivativeImageFilter.h"
#include "itkSimpleFilterWatcher.h"
int itkDiscreteGaussianDerivativeImageFilterTest( int argc, char* argv[] )
{
// Verify the number of parameters in the command line
if( argc < 6 )
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " inputFileName outputFileName orderX orderY sigma (maximum_error) (maximum_kernel_width)" << std::endl;
return EXIT_FAILURE;
}
const unsigned int Dimension = 2;
//const unsigned int Dimension = 3;
typedef float PixelType;
typedef unsigned short OutputPixelType;
typedef itk::Image<PixelType, Dimension> ImageType;
typedef itk::Image<OutputPixelType, Dimension> OutputImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
try
{
reader->Update();
}
catch ( itk::ExceptionObject &err)
{
std::cout << "ExceptionObject caught !" << std::endl;
std::cout << err << std::endl;
return EXIT_FAILURE;
}
typedef itk::DiscreteGaussianDerivativeImageFilter< ImageType, ImageType > DerivativeFilterType;
DerivativeFilterType::Pointer derivativeFilter = DerivativeFilterType::New();
derivativeFilter->SetInput( reader->GetOutput() );
// Now proceed to apply the gaussian derivative filter in both directions
double maxError = 0.001;
unsigned int maxKernelWidth = 100;
if( argc >= 7 )
{
maxError = atof( argv[6] );
}
else if( argc >= 8 )
{
maxError = atof( argv[6] );
maxKernelWidth = atoi( argv[7] );
}
DerivativeFilterType::OrderArrayType order;
order[0] = atoi( argv[3] );
order[1] = atoi( argv[4] );
double variance = atof( argv[5] );
variance *= variance;
derivativeFilter->SetMaximumError( maxError );
derivativeFilter->SetMaximumKernelWidth( maxKernelWidth );
derivativeFilter->SetVariance( variance );
derivativeFilter->SetOrder( order );
itk::SimpleFilterWatcher watcher(derivativeFilter, "derivativeFilter");
typedef itk::RescaleIntensityImageFilter< ImageType, OutputImageType >
RescaleFilterType;
RescaleFilterType::Pointer rescaler = RescaleFilterType::New();
rescaler->SetOutputMinimum( itk::NumericTraits<OutputPixelType>::min() );
rescaler->SetOutputMaximum( itk::NumericTraits<OutputPixelType>::max() );
rescaler->SetInput( derivativeFilter->GetOutput() );
typedef itk::ImageFileWriter< OutputImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName( argv[2] );
writer->SetInput( rescaler->GetOutput() );
try
{
writer->Update();
}
catch ( itk::ExceptionObject &err)
{
std::cout << "ExceptionObject caught !" << std::endl;
std::cout << err << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
|
