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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*=========================================================================
*
* 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 "itkImageToHistogramFilter.h"
#include "itkImageFileReader.h"
#include "itkSimpleFilterWatcher.h"
int itkImageToHistogramFilterTest2( int argc, char * argv [] )
{
if( argc < 3 )
{
std::cerr << "Missing command line arguments" << std::endl;
std::cerr << "Usage : " << argv[0] << " inputRGBImageFileName outputHistogramFile.txt" << std::endl;
return EXIT_FAILURE;
}
typedef unsigned char PixelComponentType;
typedef itk::RGBPixel< PixelComponentType > RGBPixelType;
const unsigned int Dimension = 2;
typedef itk::Image< RGBPixelType, Dimension > RGBImageType;
const unsigned int MeasurementVectorSize = 3; // RGB
typedef itk::ImageFileReader< RGBImageType > ReaderType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
try
{
reader->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Problem encoutered while reading image file : " << argv[1] << std::endl;
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
typedef itk::Statistics::ImageToHistogramFilter< RGBImageType > HistogramFilterType;
HistogramFilterType::Pointer histogramFilter = HistogramFilterType::New();
itk::SimpleFilterWatcher watcher(histogramFilter, "filter");
typedef HistogramFilterType::HistogramMeasurementVectorType HistogramMeasurementVectorType;
// Setting bin mins and max
HistogramMeasurementVectorType histogramBinMinimum( MeasurementVectorSize );
histogramBinMinimum[0] = -0.5;
histogramBinMinimum[1] = -0.5;
histogramBinMinimum[2] = -0.5;
HistogramMeasurementVectorType histogramBinMaximum( MeasurementVectorSize );
histogramBinMaximum[0] = 255.5;
histogramBinMaximum[1] = 255.5;
histogramBinMaximum[2] = 255.5;
histogramFilter->SetHistogramBinMinimum( histogramBinMinimum );
histogramFilter->SetHistogramBinMaximum( histogramBinMaximum );
typedef HistogramFilterType::HistogramSizeType SizeType;
SizeType size( MeasurementVectorSize );
size[0] = 255; // number of bins for the Red channel
size[1] = 1; // number of bins for the Green channel
size[2] = 1; // number of bins for the Blue channel
histogramFilter->SetHistogramSize( size );
histogramFilter->SetMarginalScale( 10.0 );
histogramFilter->SetInput( reader->GetOutput() );
try
{
histogramFilter->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
typedef HistogramFilterType::HistogramType HistogramType;
const HistogramType * histogram = histogramFilter->GetOutput();
std::ofstream outputFile;
outputFile.open( argv[2] );
const unsigned int histogramSize = histogram->Size();
outputFile << "Histogram size " << histogramSize << std::endl;
unsigned int channel = 0; // red channel
outputFile << "Histogram of the red component" << std::endl;
for( unsigned int bin=0; bin < histogramSize; bin++ )
{
outputFile << "bin = " << bin << " frequency = ";
outputFile << histogram->GetFrequency( bin, channel ) << std::endl;
}
size[0] = 1; // number of bins for the Red channel
size[1] = 255; // number of bins for the Green channel
size[2] = 1; // number of bins for the Blue channel
histogramFilter->SetHistogramSize( size );
try
{
histogramFilter->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
channel = 1; // green channel
outputFile << "Histogram of the green component" << std::endl;
for( unsigned int bin=0; bin < histogramSize; bin++ )
{
outputFile << "bin = " << bin << " frequency = ";
outputFile << histogram->GetFrequency( bin, channel ) << std::endl;
}
size[0] = 1; // number of bins for the Red channel
size[1] = 1; // number of bins for the Green channel
size[2] = 255; // number of bins for the Blue channel
histogramFilter->SetHistogramSize( size );
try
{
histogramFilter->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
channel = 2; // blue channel
outputFile << "Histogram of the blue component" << std::endl;
for( unsigned int bin=0; bin < histogramSize; bin++ )
{
outputFile << "bin = " << bin << " frequency = ";
outputFile << histogram->GetFrequency( bin, channel ) << std::endl;
}
outputFile.close();
return EXIT_SUCCESS;
}
|
