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/*=========================================================================
Program: ORFEO Toolbox
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
See OTBCopyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
// Software Guide : BeginCommandLineArgs
// INPUTS: {detected_lines.png}
// OUTPUTS: {detected_local_hough.png}
// 30 10 1 50
// Software Guide : EndCommandLineArgs
// Software Guide : BeginLatex
//
// This example illustrates the use of the \doxygen{otb}{ExtractSegmentsImageFilter}.
//
// The first step required to use this filter is to include its header file.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
#include "otbLocalHoughFilter.h"
#include "otbDrawLineSpatialObjectListFilter.h"
// Software Guide : EndCodeSnippet
#include "otbImage.h"
#include "otbImageFileReader.h"
#include "itkRescaleIntensityImageFilter.h"
#include "otbImageFileWriter.h"
int main(int argc, char * argv[])
{
if (argc != 7)
{
std::cerr << "Usage: " << argv[0] << " inputImageFile ";
std::cerr <<
" outputImageFile LocalHoughRadius LocalHoughOverlap LocalHoughNumberOfLines LocalHoughThreshold"
<< std::endl;
return EXIT_FAILURE;
}
// Software Guide : BeginLatex
//
// Then we must decide what pixel type to use for the image. We
// choose to make all computations with floating point precision
// and rescale the results between 0 and 255 in order to export PNG images.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
typedef float InternalPixelType;
typedef unsigned char OutputPixelType;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// The images are defined using the pixel type and the dimension.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
typedef otb::Image<InternalPixelType, 2> InternalImageType;
typedef otb::Image<OutputPixelType, 2> OutputImageType;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// The filter can be instantiated using the image types defined above.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
typedef otb::LocalHoughFilter<InternalImageType> LocalHoughType;
typedef otb::DrawLineSpatialObjectListFilter<InternalImageType,
OutputImageType>
DrawLineListType;
// Software Guide : EndCodeSnippet
typedef itk::RescaleIntensityImageFilter<InternalImageType,
OutputImageType> RescalerType;
RescalerType::Pointer rescaler = RescalerType::New();
rescaler->SetOutputMinimum(itk::NumericTraits<OutputPixelType>::min());
rescaler->SetOutputMaximum(itk::NumericTraits<OutputPixelType>::max());
// Software Guide : BeginLatex
//
// An \doxygen{otb}{ImageFileReader} class is also instantiated in order to read
// image data from a file.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
typedef otb::ImageFileReader<InternalImageType> ReaderType;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// An \doxygen{otb}{ImageFileWriter} is instantiated in order to write the
// output image to a file.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
typedef otb::ImageFileWriter<OutputImageType> WriterType;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Both the filter and the reader are created by invoking their \code{New()}
// methods and assigning the result to SmartPointers.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
ReaderType::Pointer reader = ReaderType::New();
LocalHoughType::Pointer localHough = LocalHoughType::New();
DrawLineListType::Pointer drawLineList = DrawLineListType::New();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// The same is done for the writer.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
WriterType::Pointer writer = WriterType::New();
// Software Guide : EndCodeSnippet
reader->SetFileName(argv[1]);
unsigned int LocalHoughRadiusX((unsigned int) ::atoi(argv[3]));
unsigned int LocalHoughRadiusY((unsigned int) ::atoi(argv[3]));
unsigned int LocalHoughOverlapX((unsigned int) ::atoi(argv[4]));
unsigned int LocalHoughOverlapY((unsigned int) ::atoi(argv[4]));
unsigned int LocalHoughNumberOfLines((unsigned int) ::atoi(argv[5]));
float LocalHoughThreshold((float) ::atoi(argv[6]));
LocalHoughType::SizeType LocalHoughRadius;
LocalHoughRadius[0] = LocalHoughRadiusX;
LocalHoughRadius[1] = LocalHoughRadiusY;
LocalHoughType::SizeType LocalHoughOverlap;
LocalHoughOverlap[0] = LocalHoughOverlapX;
LocalHoughOverlap[1] = LocalHoughOverlapY;
localHough->SetRadius(LocalHoughRadius);
localHough->SetOverlap(LocalHoughOverlap);
localHough->SetNumberOfLines(LocalHoughNumberOfLines);
localHough->SetThreshold(LocalHoughThreshold);
// Software Guide : BeginLatex
//
// The image obtained with the reader is passed as input to the
// \doxygen{otb}{ExtractSegmentsImageFilter}. The pipeline is built as follows.
//
// \index{otb::ExtractSegmentsImageFilter!SetInput()}
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
localHough->SetInput(reader->GetOutput());
drawLineList->SetInput(reader->GetOutput());
drawLineList->SetInputLineSpatialObjectList(localHough->GetOutput());
writer->SetFileName(argv[2]);
writer->SetInput(drawLineList->GetOutput());
writer->Update();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
// Figure~\ref{fig:LOCAL_HOUGH}
// shows the result of applying the \doxygen{otb}{LocalHoughImageFilter}.
// \begin{figure} \center
// \includegraphics[width=0.25\textwidth]{detected_lines.eps}
// \includegraphics[width=0.25\textwidth]{detected_local_hough.eps}
// \itkcaption[Line Correlation Detector Application]{Result of applying
// the \doxygen{otb}{LocalHoughImageFilter}. From left to right :
// original image, extracted segments.} \label{fig:LOCAL_HOUGH} \end{figure}
//
// Software Guide : EndLatex
return EXIT_SUCCESS;
}
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