ScalingPipeline.cxx 4.65 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12
/*=========================================================================

  Program:   ORFEO Toolbox
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
  See OTBCopyright.txt for details.


13 14
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 16 17 18
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/

19 20 21 22 23
//  Software Guide : BeginCommandLineArgs
//    INPUTS: {QB_Suburb.png}
//    OUTPUTS: {TutorialsScalingPipelineOutput.png}
//  Software Guide : EndCommandLineArgs

24 25
//  Software Guide : BeginLatex
//
26
//  This example illustrates the use of the
27 28 29
// \doxygen{itk}{RescaleIntensityImageFilter} to convert
// the result for proper display.
//
30 31
// We include the required header including the header
// for the \doxygen{itk}{CannyEdgeImageFilter} and the
32 33
// \doxygen{itk}{RescaleIntensityImageFilter}.
//
34
//  Software Guide : EndLatex
35 36 37 38

// Software Guide : BeginCodeSnippet
#include "otbImage.h"
#include "otbImageFileReader.h"
39
#include "otbImageFileWriter.h"
40 41 42
#include "itkCannyEdgeDetectionImageFilter.h"
#include "itkRescaleIntensityImageFilter.h"

OTB Bot's avatar
STYLE  
OTB Bot committed
43
int main(int argc, char * argv[])
44
{
45 46 47 48 49 50 51
  if (argc != 3)
    {
    std::cerr << "Usage: "
        << argv[0]
        << " <input_filename> <output_filename>"
        << std::endl;
    }
52
// Software Guide : EndCodeSnippet
53

54 55
  //  Software Guide : BeginLatex
  //
56
  //  We need to declare two different image types, one for the internal
57 58
  // processing and one to output the results:
  //
59 60
  //  Software Guide : EndLatex

61
  // Software Guide : BeginCodeSnippet
OTB Bot's avatar
STYLE  
OTB Bot committed
62
  typedef double                   PixelType;
63 64
  typedef otb::Image<PixelType, 2> ImageType;

OTB Bot's avatar
STYLE  
OTB Bot committed
65
  typedef unsigned char                  OutputPixelType;
66 67
  typedef otb::Image<OutputPixelType, 2> OutputImageType;
  // Software Guide : EndCodeSnippet
68

69 70 71 72 73 74 75 76 77 78
  //  Software Guide : BeginLatex
  //
  //  We declare the reader with the image template using the pixel type
  // double. It is worth noticing that this instanciation does not imply
  // anything about the type of the input image. The original image can be
  // anything, the reader will just convert the result to double.
  //
  //  The writer is templated with the unsigned char image to be able to save
  // the result on one byte images (like png for example).
  //
79 80
  //  Software Guide : EndLatex

81 82
  // Software Guide : BeginCodeSnippet
  typedef otb::ImageFileReader<ImageType> ReaderType;
OTB Bot's avatar
STYLE  
OTB Bot committed
83
  ReaderType::Pointer reader = ReaderType::New();
84

85
  typedef otb::ImageFileWriter<OutputImageType> WriterType;
OTB Bot's avatar
STYLE  
OTB Bot committed
86
  WriterType::Pointer writer = WriterType::New();
87 88 89 90

  reader->SetFileName(argv[1]);
  writer->SetFileName(argv[2]);
  // Software Guide : EndCodeSnippet
91

92 93
  //  Software Guide : BeginLatex
  //
94
  // Now we are declaring the edge detection filter which is going to work with
95 96
  // double input and output.
  //
97 98
  //  Software Guide : EndLatex

99
  // Software Guide : BeginCodeSnippet
100
  typedef itk::CannyEdgeDetectionImageFilter
OTB Bot's avatar
STYLE  
OTB Bot committed
101
  <ImageType, ImageType> FilterType;
102 103
  FilterType::Pointer filter = FilterType::New();
  // Software Guide : EndCodeSnippet
104

105 106
  //  Software Guide : BeginLatex
  //
107
  // Here comes the interesting part: we declare the
108
  // \doxygen{itk}{RescaleIntensityImageFilter}. The input
109 110 111
  // image type is the output type of the edge detection
  // filter. The output type is the same as the input type
  // of the writer.
112 113
  //
  // Desired minimum and maximum values for the output are
114
  // specified by the methods \code{SetOutputMinimum()} and
115 116
  // \code{SetOutputMaximum()}.
  //
117
  // This filter will actually rescale all the pixels of
118 119
  // the image but also cast the type of these pixels.
  //
120 121
  //  Software Guide : EndLatex

122 123
  // Software Guide : BeginCodeSnippet
  typedef itk::RescaleIntensityImageFilter
OTB Bot's avatar
STYLE  
OTB Bot committed
124
  <ImageType, OutputImageType> RescalerType;
125
  RescalerType::Pointer rescaler = RescalerType::New();
126

127 128
  rescaler->SetOutputMinimum(0);
  rescaler->SetOutputMaximum(255);
129
  // Software Guide : EndCodeSnippet
130

131 132 133 134
  //  Software Guide : BeginLatex
  //
  // Let's plug the pipeline:
  //
135 136
  //  Software Guide : EndLatex

137 138 139 140 141
  // Software Guide : BeginCodeSnippet
  filter->SetInput(reader->GetOutput());
  rescaler->SetInput(filter->GetOutput());
  writer->SetInput(rescaler->GetOutput());
  // Software Guide : EndCodeSnippet
142

143 144 145 146 147
  //  Software Guide : BeginLatex
  //
  // And finally, we trigger the pipeline execution calling the Update()
  // method on the writer
  //
148 149
  //  Software Guide : EndLatex

150 151 152
  // Software Guide : BeginCodeSnippet
  writer->Update();

153
  return EXIT_SUCCESS;
154 155
}
// Software Guide : EndCodeSnippet