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/*
* Copyright (C) 2005-2022 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.
*/
#include "itkMacro.h"
#include "otbImage.h"
#include "otbImageFileReader.h"
/* Example usage:
./ComplexMomentsImageFunctionExample Input/ROISpot5.png 2 2
*/
// This example illustrates the use of the \doxygen{otb}{ComplexMomentsImageFunction}.
//
// The first step required to use this filter is to include its header file.
#include "otbComplexMomentsImageFunction.h"
int main(int argc, char* argv[])
{
if (argc != 4)
{
std::cerr << "Usage: " << argv[0] << " inputImageFile ";
std::cerr << " p q" << std::endl;
return EXIT_FAILURE;
}
const char* inputFilename = argv[1];
unsigned int P((unsigned char)::atoi(argv[2]));
unsigned int Q((unsigned char)::atoi(argv[3]));
using InputPixelType = unsigned char;
const unsigned int Dimension = 2;
using InputImageType = otb::Image<InputPixelType, Dimension>;
using ReaderType = otb::ImageFileReader<InputImageType>;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(inputFilename);
// The \doxygen{otb}{ComplexMomentImageFunction} is templated over the
// input image type and the output complex type value, so we start by
// defining:
using CMType = otb::ComplexMomentsImageFunction<InputImageType>;
using OutputType = CMType::OutputType;
CMType::Pointer cmFunction = CMType::New();
// Next, we plug the input image into the complex moment function
// and we set its parameters.
reader->Update();
cmFunction->SetInputImage(reader->GetOutput());
cmFunction->SetQmax(Q);
cmFunction->SetPmax(P);
// We can chose the pixel of the image which will used as center
// for the moment computation
InputImageType::IndexType center;
center[0] = 50;
center[1] = 50;
// We can also choose the size of the neighborhood around the
// center pixel for the moment computation.
cmFunction->SetNeighborhoodRadius(15);
// In order to get the value of the moment, we call the
// \code{EvaluateAtIndex} method.
OutputType Result = cmFunction->EvaluateAtIndex(center);
std::cout << "The moment of order (" << P << "," << Q << ") is equal to " << Result.at(P).at(Q) << std::endl;
return EXIT_SUCCESS;
}
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