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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 "itkImageRandomIteratorWithIndex.h"
#include "itkImageFileWriter.h"
#include "itkImageFileReader.h"
#include "itkTestingComparisonImageFilter.h"
int itkImageRandomIteratorTest2( int argc, char * argv [] )
{
if( argc < 2 )
{
std::cerr << "Missing arguments " << std::endl;
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " outputImageFile" << std::endl;
std::cerr << "[baselineImage differenceImage]" << std::endl;
return EXIT_FAILURE;
}
const unsigned int ImageDimension = 2;
typedef unsigned long PixelType;
typedef itk::Image< PixelType, ImageDimension > ImageType;
typedef itk::ImageFileWriter< ImageType > WriterType;
ImageType::Pointer image = ImageType::New();
WriterType::Pointer writer = WriterType::New();
ImageType::SizeType size;
size[0] = 1000;
size[1] = 1000;
unsigned long numberOfSamples = size[0] * size[1];
ImageType::IndexType start;
start.Fill(0);
ImageType::RegionType region;
region.SetIndex( start );
region.SetSize( size );
image->SetRegions( region );
image->Allocate(true); // initialize buffer to zero
typedef itk::ImageRandomIteratorWithIndex< ImageType > RandomIteratorType;
RandomIteratorType it( image, region );
it.SetNumberOfSamples( numberOfSamples );
it.GoToBegin();
PixelType counter = 0;
//
// Write down the order in which pixels are visited
//
while( !it.IsAtEnd() )
{
it.Set( counter );
++it;
++counter;
}
writer->SetInput( image );
writer->SetFileName( argv[1] );
writer->Update();
if( argc > 4 )
{
typedef itk::ImageFileReader< ImageType > ReaderType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[2] );
typedef signed long DifferencePixelType;
typedef itk::Image< DifferencePixelType, ImageDimension > DifferenceImageType;
typedef itk::Testing::ComparisonImageFilter<
ImageType, DifferenceImageType > DifferenceFilterType;
DifferenceFilterType::Pointer difference = DifferenceFilterType::New();
difference->SetValidInput( image );
difference->SetTestInput( reader->GetOutput() );
difference->SetToleranceRadius( 0 );
difference->SetDifferenceThreshold( 0 );
typedef itk::ImageFileWriter< DifferenceImageType > DifferenceWriterType;
DifferenceWriterType::Pointer writer2 = DifferenceWriterType::New();
writer2->SetInput( difference->GetOutput() );
try
{
writer2->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
std::cout << "Number of pixels with differences = ";
std::cout << difference->GetNumberOfPixelsWithDifferences() << std::endl;
}
return EXIT_SUCCESS;
}
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