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/*=========================================================================
*
* 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 "itkEigenAnalysis2DImageFilter.h"
#include "itkFilterWatcher.h"
// Define the dimension of the images
const unsigned int myDimension = 2;
// Declare type for Eigen Vectors
typedef itk::Vector<double, myDimension> myVectorType;
// Declare the types of the images
typedef itk::Image<double, myDimension> myImageType;
typedef itk::Image<myVectorType, myDimension> myVectorImageType;
// Declare the type of the index to access images
typedef itk::Index<myDimension> myIndexType;
// Declare the type of the size
typedef itk::Size<myDimension> mySizeType;
// Declare the type of the Region
typedef itk::ImageRegion<myDimension> myRegionType;
// Declare Iterator types apropriated for each image
typedef itk::ImageRegionIteratorWithIndex<myImageType> myIteratorType;
typedef itk::ImageRegionIteratorWithIndex<myVectorImageType> myVectorIteratorType;
// Declare the Filter
typedef itk::EigenAnalysis2DImageFilter< myImageType,
myImageType,
myVectorImageType > myFilterType;
// Function for image initialization
void InitializeImage( myImageType * image, double value )
{
myImageType::Pointer inputImage( image );
// Define their size, and start index
mySizeType size;
size[0] = 2;
size[1] = 2;
myIndexType start;
start.Fill(0);
myRegionType region;
region.SetIndex( start );
region.SetSize( size );
inputImage->SetLargestPossibleRegion( region );
inputImage->SetBufferedRegion( region );
inputImage->SetRequestedRegion( region );
inputImage->Allocate();
myIteratorType it( inputImage,
inputImage->GetRequestedRegion() );
it.GoToBegin();
while( !it.IsAtEnd() )
{
it.Set( value );
++it;
}
}
// Function for image printing
void PrintImage( myImageType * image, const char *text )
{
myImageType::Pointer imagePtr( image );
// Create an iterator for going through the image
myIteratorType it( imagePtr,
imagePtr->GetRequestedRegion() );
it.GoToBegin();
// Print the content of the image
std::cout << text << std::endl;
while( !it.IsAtEnd() )
{
std::cout << it.Get() << std::endl;
++it;
}
}
// Function for image printing
void PrintImage( myVectorImageType * image, const char *text )
{
myVectorImageType::Pointer imagePtr( image );
// Create an iterator for going through the image
myVectorIteratorType it( imagePtr,
imagePtr->GetRequestedRegion() );
it.GoToBegin();
// Print the content of the image
std::cout << text << std::endl;
while( !it.IsAtEnd() )
{
std::cout << it.Get() << std::endl;
++it;
}
}
int itkEigenAnalysis2DImageFilterTest(int, char* [] )
{
// Create the images
myImageType::Pointer inputImageXX = myImageType::New();
myImageType::Pointer inputImageXY = myImageType::New();
myImageType::Pointer inputImageYY = myImageType::New();
InitializeImage( inputImageXX, std::cos( itk::Math::pi / 6.0 ) );
InitializeImage( inputImageXY, std::sin( itk::Math::pi / 6.0 ) );
InitializeImage( inputImageYY, std::cos( itk::Math::pi / 6.0 ) );
// Create a Filter
myFilterType::Pointer filter = myFilterType::New();
FilterWatcher watcher(filter);
// Connect the input images
filter->SetInput1( inputImageXX );
filter->SetInput2( inputImageXY );
filter->SetInput3( inputImageYY );
// Execute the filter
filter->Update();
// Get
myImageType::Pointer maxEigenValue = filter->GetMaxEigenValue();
myImageType::Pointer minEigenValue = filter->GetMinEigenValue();
myVectorImageType::Pointer maxEigenVector = filter->GetMaxEigenVector();
PrintImage( maxEigenValue, "Max Eigen Value");
PrintImage( minEigenValue, "Min Eigen Value");
PrintImage( maxEigenVector, "Max Eigen Vector");
// All objects should be automatically destroyed at this point
return EXIT_SUCCESS;
}
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