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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.
*
*=========================================================================*/
/**
*
* This program tests the RGBToVectorImageAdaptor.
*
* This class allows to take an image of pixel type RGBPixel,
* and use it as if it was an image of pixel type itk::Vector<>.
*
*/
#include "itkRGBToVectorImageAdaptor.h"
#include "itkImageRegionIteratorWithIndex.h"
//-------------------------
//
// Main code
//
//-------------------------
int
itkRGBToVectorImageAdaptorTest(int, char *[])
{
//-------------------------------------
// Typedefs for convenience
//-------------------------------------
using ComponentType = float;
using RGBPixelType = itk::RGBPixel<ComponentType>;
constexpr unsigned int ImageDimension = 2;
using ImageType = itk::Image<RGBPixelType, ImageDimension>;
using ImageAdaptorType = itk::RGBToVectorImageAdaptor<ImageType>;
using IteratorType = itk::ImageRegionIteratorWithIndex<ImageType>;
using RedIteratorType = itk::ImageRegionIteratorWithIndex<ImageAdaptorType>;
ImageType::SizeType size;
size[0] = 2;
size[1] = 2;
ImageType::IndexType index;
index[0] = 0;
index[1] = 0;
ImageType::RegionType region{ index, size };
auto image = ImageType::New();
image->SetRegions(region);
image->Allocate();
IteratorType it1(image, image->GetRequestedRegion());
// Value to initialize the pixels
ImageType::PixelType color;
color.SetRed(0.7);
color.SetGreen(0.8);
color.SetBlue(0.5);
// Initializing all the pixel in the image
it1.GoToBegin();
while (!it1.IsAtEnd())
{
it1.Set(color);
++it1;
}
// Reading the values to verify the image content
std::cout << "--- Before --- " << std::endl;
it1.GoToBegin();
while (!it1.IsAtEnd())
{
const ImageType::PixelType c(it1.Get());
std::cout << c.GetRed() << " ";
std::cout << c.GetGreen() << " ";
std::cout << c.GetBlue() << std::endl;
++it1;
}
auto adaptor = ImageAdaptorType::New();
adaptor->SetImage(image);
RedIteratorType it2(adaptor, adaptor->GetRequestedRegion());
// Set the values of the image, using the adaptor
using PixelVectorType = ImageAdaptorType::AccessorType::ExternalType;
PixelVectorType vector;
vector[0] = 13;
vector[1] = 17;
vector[2] = 19;
it2.GoToBegin();
while (!it2.IsAtEnd())
{
it2.Set(vector);
++it2;
}
std::cout << "--- After --- " << std::endl;
it1.GoToBegin();
while (!it1.IsAtEnd())
{
const ImageType::PixelType c(it1.Get());
std::cout << c.GetRed() << " ";
std::cout << c.GetGreen() << " ";
std::cout << c.GetBlue() << std::endl;
++it1;
}
return EXIT_SUCCESS;
}
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