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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
#ifndef otbMeanDifference_h
#define otbMeanDifference_h
namespace otb
{
namespace Functor
{
template <class TInput1, class TInput2, class TOutput>
class MeanDifference
{
public:
MeanDifference()
{
}
virtual ~MeanDifference()
{
}
inline TOutput operator()(const TInput1& itA, const TInput2& itB)
{
TOutput meanA = 0.0;
TOutput meanB = 0.0;
for (unsigned long pos = 0; pos < itA.Size(); ++pos)
{
meanA += static_cast<TOutput>(itA.GetPixel(pos));
meanB += static_cast<TOutput>(itB.GetPixel(pos));
}
return static_cast<TOutput>((meanA - meanB) / itA.Size());
}
};
}
}
#endif
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