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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.
*/
/* Example usage:
./IndexedToRGBExample Input/buildingExtractionIndexed.tif Output/buildingExtractionRGB.png Output/buildingExtractionIndexed_scaled.png
*/
#include "otbImage.h"
#include "otbImageFileReader.h"
#include "otbImageFileWriter.h"
#include "itkUnaryFunctorImageFilter.h"
#include "itkScalarToRGBPixelFunctor.h"
#include "itkRescaleIntensityImageFilter.h"
int main(int argc, char* argv[])
{
if (argc != 4)
{
std::cerr << "Usage: " << argv[0] << " <inputImageFile> ";
std::cerr << " <outputRGBImageFile> <outputScaledImageFile>" << std::endl;
return EXIT_FAILURE;
}
const char* inputFilename = argv[1];
const char* outputRGBFilename = argv[2];
const char* outputScaledFilename = argv[3];
using ImageType = otb::Image<unsigned long, 2>;
using RGBImageType = otb::Image<itk::RGBPixel<unsigned char>, 2>;
using ReaderType = otb::ImageFileReader<ImageType>;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(inputFilename);
// The UnaryFunctorImageFilter is the filter in charge of calling the functor
// we specify to do the work for each pixel. Here it is the ScalarToRGBPixelFunctor
using ColorMapFunctorType = itk::Functor::ScalarToRGBPixelFunctor<unsigned long>;
using ColorMapFilterType = itk::UnaryFunctorImageFilter<ImageType, RGBImageType, ColorMapFunctorType>;
ColorMapFilterType::Pointer colormapper = ColorMapFilterType::New();
colormapper->SetInput(reader->GetOutput());
using WriterType = otb::ImageFileWriter<RGBImageType>;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName(outputRGBFilename);
writer->SetInput(colormapper->GetOutput());
writer->Update();
// The following is just to produce the input image for the software guide
using OutputImageType = otb::Image<unsigned char, 2>;
using RescalerType = itk::RescaleIntensityImageFilter<ImageType, OutputImageType>;
RescalerType::Pointer rescaler = RescalerType::New();
rescaler->SetInput(reader->GetOutput());
using UCharWriterType = otb::ImageFileWriter<OutputImageType>;
UCharWriterType::Pointer writer2 = UCharWriterType::New();
writer2->SetFileName(outputScaledFilename);
writer2->SetInput(rescaler->GetOutput());
writer2->Update();
}
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