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 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.
*
*=========================================================================*/
#ifndef itkAttributeKeepNObjectsLabelMapFilter_hxx
#define itkAttributeKeepNObjectsLabelMapFilter_hxx
#include "itkAttributeKeepNObjectsLabelMapFilter.h"
#include "itkProgressReporter.h"
namespace itk {
template <typename TImage, typename TAttributeAccessor>
AttributeKeepNObjectsLabelMapFilter<TImage, TAttributeAccessor>
::AttributeKeepNObjectsLabelMapFilter()
{
m_ReverseOrdering = false;
m_NumberOfObjects = 1;
// create the output image for the removed objects
this->SetNumberOfRequiredOutputs(2);
this->SetNthOutput(1, static_cast<TImage*>(this->MakeOutput(1).GetPointer()));
}
template <typename TImage, typename TAttributeAccessor>
void
AttributeKeepNObjectsLabelMapFilter<TImage, TAttributeAccessor>
::GenerateData()
{
// Allocate the output
this->AllocateOutputs();
ImageType * output = this->GetOutput();
ImageType * output2 = this->GetOutput( 1 );
// set the background value for the second output - this is not done in the superclasses
output2->SetBackgroundValue( output->GetBackgroundValue() );
ProgressReporter progress( this, 0, 2 * output->GetNumberOfLabelObjects() );
// get the label objects in a vector, so they can be sorted
typedef typename std::vector< typename LabelObjectType::Pointer > VectorType;
VectorType labelObjects;
labelObjects.reserve( output->GetNumberOfLabelObjects() );
for( typename ImageType::Iterator it( output );
! it.IsAtEnd();
++it )
{
labelObjects.push_back( it.GetLabelObject() );
progress.CompletedPixel();
}
// instantiate the comparator and sort the vector
if( m_NumberOfObjects < output->GetNumberOfLabelObjects() )
{
typename VectorType::iterator end = labelObjects.begin() + m_NumberOfObjects;
if( m_ReverseOrdering )
{
ReverseComparator comparator;
std::nth_element( labelObjects.begin(), end, labelObjects.end(), comparator );
}
else
{
Comparator comparator;
std::nth_element( labelObjects.begin(), end, labelObjects.end(), comparator );
}
// progress.CompletedPixel();
// and move the last objects to the second output
for( typename VectorType::const_iterator it = end;
it != labelObjects.end();
it++ )
{
output->RemoveLabelObject( *it );
output2->AddLabelObject( *it );
progress.CompletedPixel();
}
}
}
template <typename TImage, typename TAttributeAccessor>
void
AttributeKeepNObjectsLabelMapFilter<TImage, TAttributeAccessor>
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
os << indent << "ReverseOrdering: " << m_ReverseOrdering << std::endl;
os << indent << "NumberOfObjects: " << m_NumberOfObjects << std::endl;
}
}// end namespace itk
#endif
|
