ComplexImageReadWrite.cxx 3.34 KB
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/*
 * Copyright (C) 1999-2011 Insight Software Consortium
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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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//  This example illustrates how to read and write an image of pixel type
//  \code{std::complex}. The complex type is defined as an integral part of the
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//  C++ language.
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//
//  We start by including the headers of the complex class, the image, and the
//  reader and writer classes.
//
//  \index{otb::ImageFileRead!Complex images}
//  \index{otb::ImageFileWrite!Complex images}
//  \index{Complex images!Instantiation}
//  \index{Complex images!Reading}
//  \index{Complex images!Writing}

#include <complex>
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#include "otbImage.h"
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#include "otbImageFileReader.h"
#include "otbImageFileWriter.h"

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int main(int argc, char* argv[])
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{

  // Verify the number of parameters in the command line
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  if (argc < 3)
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  {
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    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0] << " inputImageFile  outputImageFile " << std::endl;
    return EXIT_FAILURE;
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  }
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  // The image dimension and pixel type must be declared. In this case we use the
  // \code{std::complex<>} as the pixel type. Using the dimension and pixel type
  // we proceed to instantiate the image type.
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  const unsigned int Dimension = 2;

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  typedef std::complex<float>              PixelType;
  typedef otb::Image<PixelType, Dimension> ImageType;
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  // The image file reader and writer types are instantiated using the image
  // type. We can then create objects for both of them.
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  typedef otb::ImageFileReader<ImageType> ReaderType;
  typedef otb::ImageFileWriter<ImageType> WriterType;
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  ReaderType::Pointer reader = ReaderType::New();
  WriterType::Pointer writer = WriterType::New();

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  // Filenames should be provided for both the reader and the writer. In this
  // particular example we take those filenames from the command line arguments.
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  reader->SetFileName(argv[1]);
  writer->SetFileName(argv[2]);
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  // Here we simply connect the output of the reader as input to the writer.
  // This simple program could be used for converting complex images from one
  // fileformat to another.
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  writer->SetInput(reader->GetOutput());
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  // The execution of this short pipeline is triggered by invoking the Update()
  // method of the writer. This invocation must be placed inside a try/catch
  // block since its execution may result in exceptions being thrown.
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  try
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  {
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    writer->Update();
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  }
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  catch (itk::ExceptionObject& err)
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  {
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    std::cerr << "ExceptionObject caught !" << std::endl;
    std::cerr << err << std::endl;
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    return EXIT_FAILURE;
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  }
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  // For a more interesting use of this code, you may want to add a filter in
  // between the reader and the writer and perform any complex image to complex
  // image operation.
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  return EXIT_SUCCESS;
}