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/************************************************************************
*
* Copyright (C) 2025 IRCAD France
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "filter/image/substract.hpp"
#include <core/tools/dispatcher.hpp>
#include <io/itk/itk.hpp>
#include <itkSubtractImageFilter.h>
namespace sight::filter::image
{
//-----------------------------------------------------------------------------
void substract(const data::image& _image1, const data::image& _image2, data::image& _output)
{
auto do_substract =
[]<class PIXEL_TYPE>(const data::image& _image1, const data::image& _image2, data::image& _output)
{
constexpr unsigned int dimension = 3;
SIGHT_ASSERT("Only image dimension 3 managed.", _image1.num_dimensions() == dimension);
using image_t = itk::Image<PIXEL_TYPE, dimension>;
auto itk_image1 = io::itk::move_to_itk<image_t>(_image1);
SIGHT_ASSERT("Unable to convert data::image to itkImage", itk_image1);
auto itk_image2 = io::itk::move_to_itk<image_t>(_image2);
SIGHT_ASSERT("Unable to convert data::image to itkImage", itk_image2);
auto filter = itk::SubtractImageFilter<image_t, image_t, image_t>::New();
SIGHT_ASSERT("Filter is null", filter);
filter->SetInput1(itk_image1);
filter->SetInput2(itk_image2);
filter->Update();
auto output = filter->GetOutput();
SIGHT_ASSERT("Output is null", output->GetSource());
io::itk::move_from_itk<image_t>(output, _output, true);
};
const auto type = _image1.type();
using sight::core::tools::dispatcher;
using sight::core::tools::integer_types;
dispatcher<integer_types, decltype(do_substract)>::invoke(type, _image1, _image2, _output);
}
//-----------------------------------------------------------------------------
} // namespace sight::filter::image
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