ITK  5.3.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageGrid/CropImageBySpecifyingRegion2/Code.cxx
/*=========================================================================
*
* Copyright NumFOCUS
*
* 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 "itkImage.h"
#include "itksys/SystemTools.hxx"
#ifdef ENABLE_QUICKVIEW
# include "QuickView.h"
#endif
using PixelType = itk::RGBPixel<unsigned char>;
using ImageType = itk::Image<PixelType, 2>;
static void
CreateImage(ImageType::Pointer image);
int
main(int argc, char * argv[])
{
ImageType::Pointer image = ImageType::New();
std::stringstream desc;
if (argc > 1)
{
using ReaderType = itk::ImageFileReader<ImageType>;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(argv[1]);
if (argc > 2)
{
cropSize[0] = std::stoi(argv[2]);
cropSize[1] = std::stoi(argv[3]);
}
reader->Update();
image = reader->GetOutput();
desc << itksys::SystemTools::GetFilenameName(argv[1]);
}
else
{
CreateImage(image);
cropSize[0] = 10;
cropSize[1] = 14;
desc << "Synthetic image";
}
using CropImageFilterType = itk::CropImageFilter<ImageType, ImageType>;
CropImageFilterType::Pointer cropFilter = CropImageFilterType::New();
cropFilter->SetInput(image);
// The SetBoundaryCropSize( cropSize ) method specifies the size of
// the boundary to be cropped at both the uppper & lower ends of the
// image eg. cropSize pixels will be removed at both upper & lower
// extents
cropFilter->SetBoundaryCropSize(cropSize);
// The below two lines are equivalent to the above line:
// cropFilter->SetUpperBoundaryCropSize(cropSize);
// cropFilter->SetLowerBoundaryCropSize(cropSize);
#ifdef ENABLE_QUICKVIEW
QuickView viewer;
viewer.AddRGBImage(image.GetPointer(), true, desc.str());
std::stringstream desc2;
desc2 << "CropImageFilter, crop size = {" << cropSize[0] << ", " << cropSize[1] << "}";
viewer.AddRGBImage(cropFilter->GetOutput(), true, desc2.str());
viewer.Visualize();
#endif
return EXIT_SUCCESS;
}
void
CreateImage(ImageType::Pointer image)
{
// Create an image with 2 connected components
start[0] = 0;
start[1] = 0;
unsigned int NumRows = 200;
unsigned int NumCols = 300;
size[0] = NumRows;
size[1] = NumCols;
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
image->Allocate();
// Make a rectangle, centered at (100,150) with sides 160 & 240
// This provides a 20 x 30 border around the square for the crop filter to remove
for (unsigned int r = 20; r < 180; r++)
{
for (unsigned int c = 30; c < 270; c++)
{
pixelIndex[0] = r;
pixelIndex[1] = c;
image->SetPixel(pixelIndex, 200);
}
}
}
itk::RGBPixel
Represent Red, Green and Blue components for color images.
Definition: itkRGBPixel.h:58
itkImageFileReader.h
itk::GTest::TypedefsAndConstructors::Dimension2::SizeType
ImageBaseType::SizeType SizeType
Definition: itkGTestTypedefsAndConstructors.h:49
itkImage.h
itkCropImageFilter.h
itk::ImageFileReader
Data source that reads image data from a single file.
Definition: itkImageFileReader.h:75
itk::GTest::TypedefsAndConstructors::Dimension2::IndexType
ImageBaseType::IndexType IndexType
Definition: itkGTestTypedefsAndConstructors.h:50
QuickView::AddRGBImage
void AddRGBImage(TImage *, bool FlipVertical=true, std::string Description="")
QuickView.h
itk::GTest::TypedefsAndConstructors::Dimension2::RegionType
ImageBaseType::RegionType RegionType
Definition: itkGTestTypedefsAndConstructors.h:54
itkImageFileWriter.h
itk::NumericTraits
Define additional traits for native types such as int or float.
Definition: itkNumericTraits.h:58
itk::Size::SetSize
void SetSize(const SizeValueType val[VDimension])
Definition: itkSize.h:179
itk::CropImageFilter
Decrease the image size by cropping the image by an itk::Size at both the upper and lower bounds of t...
Definition: itkCropImageFilter.h:44
QuickView
A convenient class to render itk images with vtk.
Definition: QuickView.h:111
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86
QuickView::Visualize
void Visualize(bool interact=true)