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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 <iostream>
#include "itkImageRegionIterator.h"
#include "itkPolyLineParametricPath.h"
#include "itkPathFunctions.h"
#include "itkPathIterator.h"
int itkPathFunctionsTest(int, char*[])
{
typedef itk::Image<double, 2> ImageType;
typedef itk::PolyLineParametricPath<2> InPathType;
typedef itk::ChainCodePath<2> ChainPathType;
typedef itk::FourierSeriesPath<2> FSPathType;
typedef itk::PathIterator< ImageType, FSPathType > IterType;
typedef ImageType::IndexType IndexType;
typedef InPathType::VertexType VertexType;
bool passed = true;
// Setup the image
std::cout << "Making a 64x64 white square centered in a 128x128 black image"<<std::endl;
ImageType::Pointer image = ImageType::New();
IndexType start;
start[0]=0;
start[1]=0;
ImageType::SizeType size;
size[0]=128;
size[1]=128;
ImageType::RegionType region;
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
double spacing[ ImageType::ImageDimension ];
spacing[0]=1.0;
spacing[1]=1.0;
image->SetSpacing(spacing);
image->Allocate();
typedef itk::ImageRegionIterator<ImageType> ImageItType;
ImageItType it( image, image->GetRequestedRegion() );
it.GoToBegin();
ImageType::PixelType storedValue;
IndexType pixelIndex;
while( !it.IsAtEnd() )
{
pixelIndex = it.GetIndex();
if( pixelIndex[0] >= int(size[0]/4) && pixelIndex[0] < int(size[0]*3/4) &&
pixelIndex[1] >= int(size[1]/4) && pixelIndex[1] < int(size[1]*3/4) )
it.Set(1.0);
else
it.Set(0.0);
++it;
}
// Retrieve and print the value stored at pixel index (32,32)
pixelIndex[0]=32;
pixelIndex[1]=32;
storedValue = image->GetPixel(pixelIndex);
std::cout << "The pixel at index (" << pixelIndex[0] << "," << pixelIndex[1]
<< ") has the value " << storedValue << ".\n" << std::endl;
// Setup the path
std::cout << "Making a square Path with v0 at (30,30) and v2 at (33,33)" << std::endl;
VertexType v;
InPathType::Pointer inPath = InPathType::New();
ChainPathType::Pointer chainPath = ChainPathType::New();
FSPathType::Pointer path = FSPathType::New();
v.Fill(30);
inPath->AddVertex(v);
v[0]=33;
v[1]=30;
inPath->AddVertex(v);
v.Fill(33);
inPath->AddVertex(v);
v[0]=30;
v[1]=33;
inPath->AddVertex(v);
v.Fill(30);
inPath->AddVertex(v);
itk::MakeChainCodeTracePath( *chainPath, *inPath );
std::cout << "New ChainCodePath has "<<chainPath->NumberOfSteps()<<" steps."<<std::endl;
itk::MakeFourierSeriesPathTraceChainCode( *path, *chainPath, 2 );
// Test the iterator
std::cout << "Creating an iterator to trace the FourierSeriesPath" << std::endl;
IterType iter(image, path);
for( iter.GoToBegin(); !iter.IsAtEnd(); ++iter )
{
std::cout << "Path("<<iter.GetPathPosition()<<") @ "<<iter.GetIndex()<<" = "
<< iter.Get()<<"; Now inverting."<<std::endl;
iter.Set( 1.0 - iter.Get() );
}
for( iter.GoToBegin(); !iter.IsAtEnd(); ++iter )
{
std::cout << "Path("<<iter.GetPathPosition()<<") @ "<<iter.GetIndex()<<" = "
<< iter.Get()<<std::endl;
}
std::cout << "Should still be at end: ";
std::cout << "Path("<<iter.GetPathPosition()<<") @ "<<iter.GetIndex()<<" = "<<
iter.Get()<<std::endl;
if( (iter.GetIndex())[0] != 30 || (iter.GetIndex())[1] != 30 )
{
std::cout << "PathFunctionsTest: Failed to maintain a closed path" << std::endl;
passed = false;
}
if (passed)
{
std::cout << "Path Functions tests passed" << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "Path Functions tests failed" << std::endl;
return EXIT_FAILURE;
}
}
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