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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 "otbKMeansImageClassificationFilter.h"
#include "otbVectorImage.h"
#include "otbImage.h"
#include "otbImageFileReader.h"
#include "otbImageFileWriter.h"
int otbKMeansImageClassificationFilter(int itkNotUsed(argc), char* argv[])
{
const char* infname = argv[1];
const char* outfname = argv[2];
const unsigned int nbClasses = atoi(argv[3]);
const unsigned int Dimension = 2;
typedef double PixelType;
typedef unsigned short LabeledPixelType;
typedef otb::VectorImage<PixelType, Dimension> ImageType;
typedef otb::Image<LabeledPixelType, Dimension> LabeledImageType;
typedef otb::KMeansImageClassificationFilter<ImageType, LabeledImageType> ClassificationFilterType;
typedef ClassificationFilterType::KMeansParametersType KMeansParametersType;
typedef otb::ImageFileReader<ImageType> ReaderType;
typedef otb::ImageFileWriter<LabeledImageType> WriterType;
// Instantiating object
ClassificationFilterType::Pointer filter = ClassificationFilterType::New();
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(infname);
reader->GenerateOutputInformation();
const unsigned int sampleSize = ClassificationFilterType::MaxSampleDimension;
const unsigned int parameterSize = nbClasses * sampleSize;
KMeansParametersType parameters;
parameters.SetSize(parameterSize);
parameters.Fill(0);
for (unsigned int i = 0; i < nbClasses; ++i)
{
for (unsigned int j = 0; j < reader->GetOutput()->GetNumberOfComponentsPerPixel(); ++j)
{
parameters[i * sampleSize + j] = atof(argv[4 + i * reader->GetOutput()->GetNumberOfComponentsPerPixel() + j]);
}
}
std::cout << "Parameters: " << parameters << std::endl;
filter->SetCentroids(parameters);
filter->SetInput(reader->GetOutput());
WriterType::Pointer writer = WriterType::New();
writer->SetInput(filter->GetOutput());
writer->SetFileName(outfname);
writer->Update();
return EXIT_SUCCESS;
}
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