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/* Copyright (c) 2008-2022 the MRtrix3 contributors.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Covered Software is provided under this License on an "as is"
* basis, without warranty of any kind, either expressed, implied, or
* statutory, including, without limitation, warranties that the
* Covered Software is free of defects, merchantable, fit for a
* particular purpose or non-infringing.
* See the Mozilla Public License v. 2.0 for more details.
*
* For more details, see http://www.mrtrix.org/.
*/
#ifndef __image_min_max_h__
#define __image_min_max_h__
#include "algo/threaded_loop.h"
namespace MR
{
//! \cond skip
namespace {
template <class ImageType>
class __MinMax { NOMEMALIGN
public:
using value_type = typename ImageType::value_type;
__MinMax (value_type& overall_min, value_type& overall_max) :
overall_min (overall_min), overall_max (overall_max),
min (std::numeric_limits<value_type>::infinity()),
max (-std::numeric_limits<value_type>::infinity()) {
overall_min = min;
overall_max = max;
}
~__MinMax () {
std::lock_guard<std::mutex> lock (mutex);
overall_min = std::min (overall_min, min);
overall_max = std::max (overall_max, max);
}
void operator() (ImageType& vox) {
value_type val = vox.value();
if (std::isfinite (val)) {
if (val < min) min = val;
if (val > max) max = val;
}
}
template <class MaskType>
void operator() (ImageType& vox, MaskType& mask) {
if (mask.value()) {
value_type val = vox.value();
if (std::isfinite (val)) {
if (val < min) min = val;
if (val > max) max = val;
}
}
}
value_type& overall_min;
value_type& overall_max;
value_type min, max;
static std::mutex mutex;
};
template <class ImageType> std::mutex __MinMax<ImageType>::mutex;
}
//! \endcond
template <class ImageType>
inline void min_max (
ImageType& in,
typename ImageType::value_type& min,
typename ImageType::value_type& max,
size_t from_axis = 0,
size_t to_axis = std::numeric_limits<size_t>::max())
{
ThreadedLoop ("finding min/max of \"" + shorten (in.name()) + "\"", in, from_axis, to_axis)
.run (__MinMax<ImageType> (min, max), in);
}
template <class ImageType, class MaskType>
inline void min_max (
ImageType& in,
MaskType& mask,
typename ImageType::value_type& min,
typename ImageType::value_type& max,
size_t from_axis = 0,
size_t to_axis = std::numeric_limits<size_t>::max())
{
ThreadedLoop ("finding min/max of \"" + shorten (in.name()) + "\"", in, from_axis, to_axis)
.run (__MinMax<ImageType> (min, max), in, mask);
}
}
#endif
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