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STYLE: Use ReadImage and WriteImage in a few iterator examples #3325

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merged 1 commit into from
Mar 23, 2022
Merged

STYLE: Use ReadImage and WriteImage in a few iterator examples #3325

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30 changes: 9 additions & 21 deletions Examples/Iterators/ImageRegionIterator.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -81,9 +81,6 @@ main(int argc, char * argv[])
using IteratorType = itk::ImageRegionIterator<ImageType>;
// Software Guide : EndCodeSnippet

using ReaderType = itk::ImageFileReader<ImageType>;
using WriterType = itk::ImageFileWriter<ImageType>;

// Software Guide : BeginLatex
//
// Information about the subregion to copy is read from the command line.
Expand All @@ -108,7 +105,6 @@ main(int argc, char * argv[])
inputRegion.SetIndex(inputStart);
// Software Guide : EndCodeSnippet


// Software Guide : BeginLatex
//
// The destination region in the output image is defined using the input
Expand All @@ -129,12 +125,10 @@ main(int argc, char * argv[])
outputRegion.SetIndex(outputStart);
// Software Guide : EndCodeSnippet


auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
ImageType::ConstPointer inputImage;
try
{
reader->Update();
inputImage = itk::ReadImage<ImageType>(argv[1]);
}
catch (const itk::ExceptionObject & err)
{
Expand All @@ -144,12 +138,12 @@ main(int argc, char * argv[])
}

// Check that the region is contained within the input image.
if (!reader->GetOutput()->GetRequestedRegion().IsInside(inputRegion))
if (!inputImage->GetRequestedRegion().IsInside(inputRegion))
{
std::cerr << "Error" << std::endl;
std::cerr << "The region " << inputRegion
<< "is not contained within the input image region "
<< reader->GetOutput()->GetRequestedRegion() << std::endl;
<< inputImage->GetRequestedRegion() << std::endl;
return EXIT_FAILURE;
}

Expand All @@ -170,9 +164,9 @@ main(int argc, char * argv[])
// Software Guide : BeginCodeSnippet
auto outputImage = ImageType::New();
outputImage->SetRegions(outputRegion);
const ImageType::SpacingType & spacing = reader->GetOutput()->GetSpacing();
const ImageType::PointType & inputOrigin = reader->GetOutput()->GetOrigin();
double outputOrigin[Dimension];
const ImageType::SpacingType & spacing = inputImage->GetSpacing();
const ImageType::PointType & inputOrigin = inputImage->GetOrigin();
double outputOrigin[Dimension];

for (unsigned int i = 0; i < Dimension; ++i)
{
Expand All @@ -184,7 +178,6 @@ main(int argc, char * argv[])
outputImage->Allocate();
// Software Guide : EndCodeSnippet


// Software Guide : BeginLatex
//
// \index{Iterators!construction of} \index{Iterators!and image regions}
Expand All @@ -199,7 +192,7 @@ main(int argc, char * argv[])
// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet
ConstIteratorType inputIt(reader->GetOutput(), inputRegion);
ConstIteratorType inputIt(inputImage, inputRegion);
IteratorType outputIt(outputImage, outputRegion);

inputIt.GoToBegin();
Expand All @@ -213,7 +206,6 @@ main(int argc, char * argv[])
}
// Software Guide : EndCodeSnippet


// Software Guide : BeginLatex
//
// \index{Iterators!image dimensionality}
Expand All @@ -225,13 +217,9 @@ main(int argc, char * argv[])
//
// Software Guide : EndLatex

auto writer = WriterType::New();
writer->SetFileName(argv[2]);
writer->SetInput(outputImage);

try
{
writer->Update();
itk::WriteImage(outputImage, argv[2]);
}
catch (const itk::ExceptionObject & err)
{
Expand Down
12 changes: 2 additions & 10 deletions Examples/Iterators/ImageRegionIteratorWithIndex.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -82,16 +82,11 @@ main(int argc, char * argv[])
using IteratorType = itk::ImageRegionIteratorWithIndex<ImageType>;
// Software Guide : EndCodeSnippet

using ReaderType = itk::ImageFileReader<ImageType>;
using WriterType = itk::ImageFileWriter<ImageType>;

ImageType::ConstPointer inputImage;
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
try
{
reader->Update();
inputImage = reader->GetOutput();
inputImage = itk::ReadImage<ImageType>(argv[1]);
}
catch (const itk::ExceptionObject & err)
{
Expand Down Expand Up @@ -149,12 +144,9 @@ main(int argc, char * argv[])
}
// Software Guide : EndCodeSnippet

auto writer = WriterType::New();
writer->SetFileName(argv[2]);
writer->SetInput(outputImage);
try
{
writer->Update();
itk::WriteImage(outputImage, argv[2]);
}
catch (const itk::ExceptionObject & err)
{
Expand Down
14 changes: 2 additions & 12 deletions Examples/Iterators/ImageSliceIteratorWithIndex.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -145,16 +145,10 @@ main(int argc, char * argv[])
itk::ImageSliceConstIteratorWithIndex<ImageType3D>;
// Software Guide : EndCodeSnippet

using ReaderType = itk::ImageFileReader<ImageType3D>;
using WriterType = itk::ImageFileWriter<ImageType2D>;

ImageType3D::ConstPointer inputImage;
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
try
{
reader->Update();
inputImage = reader->GetOutput();
inputImage = itk::ReadImage<ImageType3D>(argv[1]);
}
catch (const itk::ExceptionObject & err)
{
Expand Down Expand Up @@ -187,7 +181,6 @@ main(int argc, char * argv[])
}
// Software Guide : EndCodeSnippet


// Software Guide : BeginLatex
//
// The \code{direction} array is now used to define the projection image
Expand Down Expand Up @@ -286,12 +279,9 @@ main(int argc, char * argv[])
}
// Software Guide : EndCodeSnippet

auto writer = WriterType::New();
writer->SetFileName(argv[2]);
writer->SetInput(outputImage);
try
{
writer->Update();
itk::WriteImage(outputImage, argv[2]);
}
catch (const itk::ExceptionObject & err)
{
Expand Down