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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 <iostream>
#include "itkRGBPixel.h"
#include "itkComposeImageFilter.h"
int
itkComposeRGBImageFilterTest(int, char *[])
{
using PixelType = unsigned char;
using InputImageType = itk::Image<PixelType, 3>;
using RGBPixelType = itk::RGBPixel<unsigned char>;
using OutputImageType = itk::Image<RGBPixelType, 3>;
using FilterType = itk::ComposeImageFilter<InputImageType, OutputImageType>;
using RegionType = InputImageType::RegionType;
using SizeType = InputImageType::SizeType;
using IndexType = InputImageType::IndexType;
auto filter = FilterType::New();
auto redImage = InputImageType::New();
auto greenImage = InputImageType::New();
auto blueImage = InputImageType::New();
SizeType size;
size[0] = 2;
size[1] = 2;
size[2] = 2;
IndexType start;
start.Fill(0);
RegionType region;
region.SetIndex(start);
region.SetSize(size);
redImage->SetRegions(region);
greenImage->SetRegions(region);
blueImage->SetRegions(region);
redImage->Allocate();
greenImage->Allocate();
blueImage->Allocate();
redImage->FillBuffer(29);
greenImage->FillBuffer(51);
blueImage->FillBuffer(83);
filter->SetInput1(redImage);
filter->SetInput2(greenImage);
filter->SetInput3(blueImage);
try
{
filter->Update();
}
catch (const itk::ExceptionObject & excp)
{
std::cerr << "Exception caught !" << std::endl;
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
OutputImageType::Pointer rgbImage = filter->GetOutput();
using OutputIterator = itk::ImageRegionIterator<OutputImageType>;
using InputIterator = itk::ImageRegionIterator<InputImageType>;
InputIterator ir(redImage, region);
InputIterator ig(greenImage, region);
InputIterator ib(blueImage, region);
OutputIterator ot(rgbImage, region);
ir.GoToBegin();
ig.GoToBegin();
ib.GoToBegin();
ot.GoToBegin();
using OutputPixelType = OutputImageType::PixelType;
while (!ot.IsAtEnd())
{
OutputPixelType outp = ot.Get();
if (ir.Get() != outp.GetRed())
{
std::cerr << "Error in red component" << std::endl;
return EXIT_FAILURE;
}
if (ig.Get() != outp.GetGreen())
{
std::cerr << "Error in green component" << std::endl;
return EXIT_FAILURE;
}
if (ib.Get() != outp.GetBlue())
{
std::cerr << "Error in blue component" << std::endl;
return EXIT_FAILURE;
}
++ot;
++ir;
++ig;
++ib;
}
std::cout << "Test Passed !" << std::endl;
return EXIT_SUCCESS;
}
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