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/*
* Copyright (c) 2017-2019 Arm Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "arm_compute/core/Helpers.h"
#include "Median3x3.h"
#include "Utils.h"
namespace arm_compute
{
namespace test
{
namespace validation
{
namespace reference
{
namespace
{
constexpr unsigned int filter_size = 3; /* Size of the kernel/filter in number of elements. */
constexpr BorderSize border_size(filter_size / 2); /* Border size of the kernel/filter around its central element. */
} // namespace
template <typename T>
SimpleTensor<T> median3x3(const SimpleTensor<T> &src, BorderMode border_mode, T constant_border_value)
{
SimpleTensor<T> dst(src.shape(), src.data_type());
const int size_tot_filter = filter_size * filter_size;
const uint32_t num_elements = src.num_elements();
for(uint32_t src_idx = 0; src_idx < num_elements; ++src_idx)
{
std::array<T, size_tot_filter> filter_elems = { { 0 } };
Coordinates id = index2coord(src.shape(), src_idx);
const int x = id.x();
const int y = id.y();
for(int j = y - static_cast<int>(border_size.top), index = 0; j <= y + static_cast<int>(border_size.bottom); ++j)
{
for(int i = x - static_cast<int>(border_size.left); i <= x + static_cast<int>(border_size.right); ++i, ++index)
{
id.set(0, i);
id.set(1, j);
filter_elems[index] = tensor_elem_at(src, id, border_mode, constant_border_value);
}
}
std::sort(filter_elems.begin(), filter_elems.end());
dst[src_idx] = filter_elems[size_tot_filter / 2];
}
return dst;
}
template SimpleTensor<uint8_t> median3x3(const SimpleTensor<uint8_t> &src, BorderMode border_mode, uint8_t constant_border_value);
} // namespace reference
} // namespace validation
} // namespace test
} // namespace arm_compute
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