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/*=========================================================================
*
* 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
*
* https://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 "itkCheckerBoardImageFilter.h"
#include "itkImageFileWriter.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkTestingMacros.h"
int
itkCheckerBoardImageFilterTest(int argc, char * argv[])
{
if (argc < 2)
{
std::cout << "Usage: " << itkNameOfTestExecutableMacro(argv) << " outputImage " << std::endl;
return EXIT_FAILURE;
}
// Define the dimension of the images
constexpr unsigned int Dimension = 3;
// Declare the pixel types of the images
using PixelType = unsigned char;
// Declare the types of the images
using ImageType = itk::Image<PixelType, Dimension>;
// Declare the type of the index to access images
using IndexType = itk::Index<Dimension>;
// Declare the type of the size
using SizeType = itk::Size<Dimension>;
// Declare the type of the Region
using RegionType = itk::ImageRegion<Dimension>;
// Declare the type for the filter
using CheckerBoardImageFilterType = itk::CheckerBoardImageFilter<ImageType>;
// Declare the type of the arrays that define how many
// checkers to have along every dimension.
using CheckerBoardPatternArrayType = CheckerBoardImageFilterType::PatternArrayType;
// Create the input images
auto inputImageA = ImageType::New();
auto inputImageB = ImageType::New();
// Define their size, and start index
SizeType size;
size[0] = 40;
size[1] = 40;
size[2] = 40;
IndexType start;
start[0] = 0;
start[1] = 0;
start[2] = 0;
RegionType region;
region.SetIndex(start);
region.SetSize(size);
// Initialize Image A
inputImageA->SetRegions(region);
inputImageA->Allocate();
// Initialize Image B
inputImageB->SetRegions(region);
inputImageB->Allocate();
// Declare appropriate Iterator types for each image
using IteratorType = itk::ImageRegionIteratorWithIndex<ImageType>;
// Create one iterator for Image A (this is a light object)
IteratorType it1(inputImageA, inputImageA->GetBufferedRegion());
// Initialize the content of Image A
constexpr ImageType::PixelType input1Value = 2;
while (!it1.IsAtEnd())
{
it1.Set(input1Value);
++it1;
}
// Create one iterator for Image B (this is a light object)
IteratorType it2(inputImageB, inputImageB->GetBufferedRegion());
// Initialize the content of Image B
constexpr ImageType::PixelType input2Value = 3;
while (!it2.IsAtEnd())
{
it2.Set(input2Value);
++it2;
}
// Create the filter
auto checkerBoard = CheckerBoardImageFilterType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(checkerBoard, CheckerBoardImageFilter, ImageToImageFilter);
// Set the input images
checkerBoard->SetInput1(inputImageA);
checkerBoard->SetInput2(inputImageB);
CheckerBoardPatternArrayType pattern;
pattern[0] = 4; // number of checkers along X
pattern[1] = 8; // number of checkers along Y
pattern[2] = 10; // number of checkers along Z
checkerBoard->SetCheckerPattern(pattern);
ITK_TEST_SET_GET_VALUE(pattern, checkerBoard->GetCheckerPattern());
// Execute the filter
checkerBoard->Update();
// Get the filter output
ImageType::Pointer outputImage = checkerBoard->GetOutput();
// Write the result image
using WriterType = itk::ImageFileWriter<ImageType>;
auto writer = WriterType::New();
writer->SetFileName(argv[1]);
writer->SetInput(outputImage);
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
// All objects should be automatically destroyed at this point
return EXIT_SUCCESS;
}
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