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/************************************************************************
*
* Copyright (C) 2018-2024 IRCAD France
* Copyright (C) 2018-2020 IHU Strasbourg
*
* 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/flipper.hpp"
#include <core/tools/dispatcher.hpp>
#include <data/helper/medical_image.hpp>
#include <io/itk/itk.hpp>
#include <itkFlipImageFilter.h>
namespace sight::filter::image
{
struct parameters
{
data::image::csptr i_image;
std::array<bool, 3> i_flip_axes {};
data::image::sptr o_image;
};
//------------------------------------------------------------------------------
template<typename pixel_t, int dimension>
struct flipping
{
//------------------------------------------------------------------------------
void operator()(parameters& _params)
{
using image_t = typename itk::Image<pixel_t, dimension>;
const typename image_t::Pointer itk_image = io::itk::move_to_itk<image_t>(_params.i_image);
typename itk::FlipImageFilter<image_t>::Pointer flip_filter =
itk::FlipImageFilter<image_t>::New();
flip_filter->SetInput(itk_image);
typename itk::FlipImageFilter<image_t>::FlipAxesArrayType axes;
for(std::size_t i = 0 ; i < axes.Size() && i < _params.i_flip_axes.size() ; i++)
{
axes[static_cast<unsigned int>(i)] = _params.i_flip_axes[i];
}
flip_filter->SetFlipAxes(axes);
flip_filter->Update();
typename image_t::Pointer output_image = flip_filter->GetOutput();
io::itk::move_from_itk(output_image, _params.o_image);
}
};
struct flipping_dimension_extractor
{
//------------------------------------------------------------------------------
template<class pixel_t>
void operator()(parameters& _params)
{
const data::image::size_t size = _params.i_image->size();
switch(size.size())
{
case 1:
flipping<pixel_t, 1> d1;
d1(_params);
break;
case 2:
flipping<pixel_t, 2> d2;
d2(_params);
break;
case 3:
flipping<pixel_t, 3> d3;
d3(_params);
break;
default:
SIGHT_ERROR(
"Flipping cannot be performed due to incompatible image size ("
+ std::to_string(size.size()) + ")."
);
// In this case, we just deep copy the input image in the output
_params.o_image->deep_copy(_params.i_image);
break;
}
}
};
//-----------------------------------------------------------------------------
void flipper::flip(
const data::image::csptr& _in_image,
const data::image::sptr& _out_image,
const std::array<bool, 3>& _in_flip_axes
)
{
// If the image is valid, process it, otherwise copy it in the output image
if(data::helper::medical_image::check_image_validity(_in_image))
{
parameters params;
params.i_image = _in_image;
params.i_flip_axes = _in_flip_axes;
params.o_image = _out_image;
const core::type type = _in_image->type();
core::tools::dispatcher<core::tools::supported_dispatcher_types, flipping_dimension_extractor>::invoke(
type,
params
);
}
else
{
_out_image->deep_copy(_in_image);
}
}
//-----------------------------------------------------------------------------
} // namespace sight::filter::image
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