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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkVectorGradientMagnitudeImageFilterTest2.cxx,v $
Language: C++
Date: $Date: 2004-04-15 17:25:34 $
Version: $Revision: 1.9 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include <fstream>
#include "itkVectorGradientMagnitudeImageFilter.h"
#include "itkPNGImageIO.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkImageRegionIterator.h"
#include "itkRGBPixel.h"
#include "itkImageRegionIterator.h"
#include "itkRescaleIntensityImageFilter.h"
#include "vnl/vnl_math.h"
int itkVectorGradientMagnitudeImageFilterTest2(int ac, char* av[] )
{
typedef itk::RGBPixel<unsigned char> RGBPixelType;
typedef itk::Image<RGBPixelType, 3> RGBImageType;
typedef itk::Image<unsigned char, 3> CharImage3Type;
typedef itk::Image<unsigned char, 2> CharImage2Type;
typedef itk::VectorGradientMagnitudeImageFilter<RGBImageType> FilterType;
typedef itk::ImageFileReader<RGBImageType> ReaderType;
typedef itk::RescaleIntensityImageFilter<FilterType::OutputImageType,
CharImage3Type> RescaleFilterType;
typedef itk::ImageFileWriter<CharImage2Type> WriterType;
if(ac < 5)
{
std::cerr << "Usage: " << av[0] << " InputImage OutputImage Mode SliceToExtract\n";
return EXIT_FAILURE;
}
// Create a reader and filter
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(av[1]);
FilterType::Pointer filter = FilterType::New();
filter->SetInput(reader->GetOutput());
const int mode = ::atoi( av[3] );
if ( mode == 1)
{
filter->SetUsePrincipleComponentsOn();
}
else
{
filter->SetUsePrincipleComponentsOff();
}
RescaleFilterType::Pointer rescale = RescaleFilterType::New();
rescale->SetOutputMinimum(0);
rescale->SetOutputMaximum(255);
rescale->SetInput( filter->GetOutput() );
WriterType::Pointer writer = WriterType::New();
writer->SetFileName( av[2] );
try
{
rescale->Update();
// Extract one slice to write for regression testing
CharImage3Type::RegionType extractedRegion = rescale->GetOutput()->GetRequestedRegion();
extractedRegion.SetSize(2,1);
extractedRegion.SetIndex(2,::atoi(av[4]));
CharImage2Type::Pointer extractedImage = CharImage2Type::New();
CharImage2Type::RegionType reg;
reg.SetSize(0,extractedRegion.GetSize()[0]);
reg.SetSize(1,extractedRegion.GetSize()[1]);
reg.SetIndex(0,0);
reg.SetIndex(1,0);
extractedImage->SetRegions(reg);
extractedImage->Allocate();
double sp[2];
sp[0] = rescale->GetOutput()->GetSpacing()[0];
sp[1] = rescale->GetOutput()->GetSpacing()[1];
extractedImage->SetSpacing(sp);
itk::ImageRegionIterator<CharImage3Type> in(rescale->GetOutput(), extractedRegion);
itk::ImageRegionIterator<CharImage2Type> out(extractedImage,
extractedImage->GetRequestedRegion());
for (; !in.IsAtEnd(); ++in, ++out)
{
out.Set(in.Get());
}
writer->SetInput( extractedImage );
writer->Update();
}
catch (itk::ExceptionObject& e)
{
std::cerr << "Exception detected: " << e.GetDescription();
return EXIT_FAILURE;
}
catch (...)
{
std::cerr << "Some other exception occurred" << std::endl;
return EXIT_FAILURE;
}
std::cout << "The gradient image range was (low, high) = ("
<< rescale->GetInputMinimum() << ", " << rescale->GetInputMaximum()
<< ")" << std::endl;
std::cout << "Output was scaled, shifted = " << rescale->GetScale() << ", "
<< rescale->GetShift() << std::endl;
return EXIT_SUCCESS;
}
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