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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkRGBToVectorAdaptImageFilterTest.cxx
Language: C++
Date: $Date$
Version: $Revision$
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
/**
*
* This program illustrates the AdaptImageFilter
*
* The example shows how an Accessor can be used to
* convert an RGBPixel image to an image that has
* vector pixel type.
*
* This allows to access an RGB image a an image of vectors.
*
*/
#include <itkAdaptImageFilter.h>
#include <itkImageRegionIteratorWithIndex.h>
#include <itkRGBPixel.h>
#include <itkRGBToVectorPixelAccessor.h>
#include <vnl/vnl_sample.h>
//-------------------------
//
// Main code
//
//-------------------------
int itkRGBToVectorAdaptImageFilterTest(int, char* [] ) {
//-------------------------------------
// Typedefs for convenience
//-------------------------------------
typedef itk::RGBPixel< float > RGBPixelType;
typedef itk::Image< RGBPixelType, 2 > RGBImageType;
typedef itk::ImageRegionIteratorWithIndex< RGBImageType > myRGBIteratorType;
typedef itk::Accessor::RGBToVectorPixelAccessor<float> AccessorType;
typedef AccessorType::ExternalType VectorPixelType;
typedef itk::Image< VectorPixelType, 2 > myImageType;
typedef itk::ImageRegionIteratorWithIndex< myImageType > myVectorIteratorType;
RGBImageType::SizeType size;
size[0] = 100;
size[1] = 100;
RGBImageType::IndexType index;
index[0] = 0;
index[1] = 0;
RGBImageType::RegionType region;
region.SetIndex( index );
region.SetSize( size );
RGBImageType::Pointer myImage = RGBImageType::New();
myImage->SetRegions( region );
myImage->Allocate();
myRGBIteratorType it1( myImage, myImage->GetRequestedRegion() );
// Value to initialize the pixels
RGBImageType::PixelType color;
// Initializing all the pixel in the image
it1.GoToBegin();
while( !it1.IsAtEnd() )
{
color.Set( (float) vnl_sample_uniform(0.0, 1.0),
(float) vnl_sample_uniform(0.0, 1.0),
(float) vnl_sample_uniform(0.0, 1.0) );
it1.Set(color);
++it1;
}
bool passed = true;
// Convert to a Vector image
typedef itk::AdaptImageFilter< RGBImageType,
myImageType,
AccessorType > AdaptFilterType;
AdaptFilterType::Pointer adaptImageToVector = AdaptFilterType::New();
adaptImageToVector->SetInput(myImage);
adaptImageToVector->UpdateLargestPossibleRegion();
myVectorIteratorType it(
adaptImageToVector->GetOutput(),
adaptImageToVector->GetOutput()->GetRequestedRegion() );
std::cout << "--- Read Vector values --- " << std::endl;
it.GoToBegin();
it1.GoToBegin();
while( !it.IsAtEnd() )
{
VectorPixelType v = it.Get();
RGBPixelType c = it1.Get();
if ( v[0] != c.GetRed() ||
v[1] != c.GetGreen() ||
v[2] != c.GetBlue() )
{
std::cerr << "Vector pixel = " << v << std::endl;
std::cerr << "does not match " << std::endl;
std::cerr << "RGB pixel = " << c << std::endl;
std::cerr << "myImage->GetRequestedRegion()" << myImage->GetRequestedRegion() << std::endl;
std::cerr << "adaptImageToVector->GetRequestedRegion()" << adaptImageToVector->GetOutput()->GetRequestedRegion() << std::endl;
passed = false;
break;
}
++it;
++it1;
}
std::cout << std::endl;
if (passed)
{
std::cout << "AdaptImageFilterTest passed" << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "AdaptImageFilterTest passed" << std::endl;
return EXIT_FAILURE;
}
}
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