DEMToRainbowExample.cxx 4.37 KB
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/*
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 * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
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 *
 * 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.
 */
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/* Example usage:
./DEMToRainbowExample Output/DEMToRainbowImageGenerator.png 6.5 45.5 500 500 0.002 -0.002 Input/DEM_srtm
*/
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/* Example usage:
./DEMToRainbowExample Output/DEMToHotImageGenerator.png 6.5 45.5 500 500 0.002 -0.002 Input/DEM_srtm hot
*/


/* Example usage:
./DEMToRainbowExample Output/DEMToReliefImageGenerator.png 6.5 45.5 500 500 0.002 -0.002 Input/DEM_srtm relief
*/
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#include "otbImageFileReader.h"
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#include "otbImageFileWriter.h"
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#include "itkScalarToRGBColormapImageFilter.h"
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#include "otbScalarToRainbowRGBPixelFunctor.h"
#include "otbDEMToImageGenerator.h"
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#include "otbReliefColormapFunctor.h"
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int main(int argc, char* argv[])
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{
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  if (argc < 9)
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  {
    std::cout << argv[0] << " <output_filename> <Longitude Output Origin point>";
    std::cout << " <Latitude Output Origin point> <X Output Size> <Y Output size>";
    std::cout << " <X Spacing> <Y Spacing> <DEM folder path>" << std::endl;
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    return EXIT_FAILURE;
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  }
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  using PixelType      = double;
  using UCharPixelType = unsigned char;
  using RGBPixelType   = itk::RGBPixel<UCharPixelType>;
  using ImageType      = otb::Image<PixelType, 2>;
  using RGBImageType   = otb::Image<RGBPixelType, 2>;
  using WriterType     = otb::ImageFileWriter<RGBImageType>;
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  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName(argv[1]);
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  using DEMToImageGeneratorType = otb::DEMToImageGenerator<ImageType>;
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  DEMToImageGeneratorType::Pointer demToImage = DEMToImageGeneratorType::New();

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  using SizeType    = DEMToImageGeneratorType::SizeType;
  using SpacingType = DEMToImageGeneratorType::SpacingType;
  using PointType   = DEMToImageGeneratorType::PointType;
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  otb::DEMHandler::Instance()->OpenDEMDirectory(argv[8]);
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  PointType origin;
  origin[0] = ::atof(argv[2]);
  origin[1] = ::atof(argv[3]);

  demToImage->SetOutputOrigin(origin);

  SizeType size;
  size[0] = ::atoi(argv[4]);
  size[1] = ::atoi(argv[5]);

  demToImage->SetOutputSize(size);

  SpacingType spacing;
  spacing[0] = ::atof(argv[6]);
  spacing[1] = ::atof(argv[7]);

  demToImage->SetOutputSpacing(spacing);
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  // The ScalarToRGBColormapImageFilter is
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  // the filter in charge of calling the functor we specify to do the work for
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  // each pixel. Here it is the ScalarToRainbowRGBPixelFunctor.
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  using ColorMapFilterType                = itk::ScalarToRGBColormapImageFilter<ImageType, RGBImageType>;
  ColorMapFilterType::Pointer colormapper = ColorMapFilterType::New();
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  colormapper->UseInputImageExtremaForScalingOff();
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  if (argc == 9)
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  {
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    using ColorMapFunctorType             = otb::Functor::ScalarToRainbowRGBPixelFunctor<PixelType, RGBPixelType>;
    ColorMapFunctorType::Pointer colormap = ColorMapFunctorType::New();
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    colormap->SetMinimumInputValue(0);
    colormap->SetMaximumInputValue(4000);
    colormapper->SetColormap(colormap);
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  }
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  else
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  {
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    if (strcmp(argv[9], "hot") == 0)
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    {
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      using ColorMapFunctorType             = itk::Function::HotColormapFunction<PixelType, RGBPixelType>;
      ColorMapFunctorType::Pointer colormap = ColorMapFunctorType::New();
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      colormap->SetMinimumInputValue(0);
      colormap->SetMaximumInputValue(4000);
      colormapper->SetColormap(colormap);
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    }
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    else
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    {
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      using ColorMapFunctorType             = otb::Functor::ReliefColormapFunctor<PixelType, RGBPixelType>;
      ColorMapFunctorType::Pointer colormap = ColorMapFunctorType::New();
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      colormap->SetMinimumInputValue(0);
      colormap->SetMaximumInputValue(4000);
      colormapper->SetColormap(colormap);
    }
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  }
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  // And we connect the color mapper filter with the filter producing
  // the image of the DEM:

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  colormapper->SetInput(demToImage->GetOutput());
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  writer->SetInput(colormapper->GetOutput());
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  writer->Update();
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}