From 4ed16a66c551cf01aa50479137d3ba26ce703a84 Mon Sep 17 00:00:00 2001
From: Jordi Inglada <jordi.inglada@orfeo-toolbox.org>
Date: Thu, 29 Jun 2006 14:36:29 +0000
Subject: [PATCH] Exemple Metadata
---
Examples/IO/CMakeLists.txt | 4 +
Examples/IO/MetadataExample.cxx | 213 ++++++++++++++++++++++++++++++++
2 files changed, 217 insertions(+)
create mode 100755 Examples/IO/MetadataExample.cxx
diff --git a/Examples/IO/CMakeLists.txt b/Examples/IO/CMakeLists.txt
index cb47647af9..5057254938 100644
--- a/Examples/IO/CMakeLists.txt
+++ b/Examples/IO/CMakeLists.txt
@@ -40,6 +40,10 @@ TARGET_LINK_LIBRARIES(MultibandImageReadWrite OTBCommon OTBIO ITKCommon ITKIO)
ADD_EXECUTABLE(ExtractROI ExtractROI.cxx )
TARGET_LINK_LIBRARIES(ExtractROI OTBCommon OTBIO ITKCommon ITKIO)
+ADD_EXECUTABLE(MetadataExample MetadataExample.cxx )
+TARGET_LINK_LIBRARIES(MetadataExample OTBCommon OTBIO ITKCommon ITKIO)
+
+
#ADD_EXECUTABLE(ImageReadExportVTK ImageReadExportVTK.cxx )
#TARGET_LINK_LIBRARIES(ImageReadExportVTK ITKCommon ITKIO)
diff --git a/Examples/IO/MetadataExample.cxx b/Examples/IO/MetadataExample.cxx
new file mode 100755
index 0000000000..2014515029
--- /dev/null
+++ b/Examples/IO/MetadataExample.cxx
@@ -0,0 +1,213 @@
+/*=========================================================================
+
+ 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.
+
+=========================================================================*/
+
+#if defined(_MSC_VER)
+#pragma warning ( disable : 4786 )
+#endif
+
+// SoftwareGuide: BeginLatex
+//
+// This example illustrates the access to metadata image information
+// with OTB. By metadata, we mean data which is typically stored with
+// remote sensing images, like geographical coordinates of pixels,
+// pixel spacing or resolution, etc. Of course, the availability of
+// these data depends on the image format used and on the fact that
+// the image producer must fill the available metadata fields. The
+// image formats which typically support metadata are for example
+// CEOS and GeoTiff.
+//
+// The metadata support is embedded in OTB's IO functionnalities and
+// is accessible through the \doxygen{otb::Image} and
+// \doxygen{otb::VectorImage} classes. You should avoid using the
+// \doxygen{itk::Image} class if you want to have metadata support.
+//
+// SoftwareGuide: EndLatex
+
+
+#include "itkExceptionObject.h"
+#include <iostream>
+#include <fstream>
+#include <string>
+
+#include "otbImage.h"
+#include "otbImageFileReader.h"
+
+
+int main(int argc, char* argv[])
+{
+
+ // Verify the number of parameters in the command line
+ const char * inputFilename = argv[1];
+ const char * outputAsciiFilename = argv[2];
+
+// SoftwareGuide: BeginLatex
+//
+// This simple example will consist on reading an image from a file
+// and writing the metadata to an output ASCII file. As usual we
+// start by defining the types needed for the image to be read.
+//
+// SoftwareGuide: EndLatex
+
+// SoftwareGuide: BeginCodeSnippet
+
+ typedef unsigned char InputPixelType;
+ const unsigned int Dimension = 2;
+
+
+ typedef otb::Image< InputPixelType, Dimension > InputImageType;
+
+ typedef otb::ImageFileReader< InputImageType > ReaderType;
+// SoftwareGuide: EndCodeSnippet
+// SoftwareGuide: BeginLatex
+//
+// We can now instantiate the reader and get a pointer to the input image.
+//
+// SoftwareGuide: EndLatex
+
+// SoftwareGuide: BeginCodeSnippet
+
+
+ ReaderType::Pointer reader = ReaderType::New();
+ InputImageType::Pointer image = InputImageType::New();
+
+ reader->SetFileName( inputFilename );
+ reader->Update();
+
+ image = reader->GetOutput();
+
+// SoftwareGuide: EndCodeSnippet
+// SoftwareGuide: BeginLatex
+//
+// Once the image has been read, we can access the metadata
+// information. We will copy this information to an ASCII file, so we
+// create an output file stream for this purpose.
+//
+// SoftwareGuide: EndLatex
+
+// SoftwareGuide: BeginCodeSnippet
+
+
+ std::ofstream file;
+
+ file.open(outputAsciiFilename);
+
+// SoftwareGuide: EndCodeSnippet
+// SoftwareGuide: BeginLatex
+//
+// We can now call the different available methods for accessing the
+// metadata. Useful methods are :
+// \begin{itemize}
+// \item \code{GetSpacing}: the sampling step;
+// \item \code{GetOrigin}: the coordinates of the origin of the image;
+// \item \code{GetProjectionRef}: the image projection reference;
+// \item \code{GetGCPProjection}: the projection for the eventual
+// ground control points;
+// \item \code{GetGCPCount}: the number of GCPs available;
+// \end{itemize}
+//
+// SoftwareGuide: EndLatex
+
+// SoftwareGuide: BeginCodeSnippet
+
+
+ file << "Spacing " << image->GetSpacing() << std::endl;
+ file << "Origin " << image->GetOrigin() << std::endl;
+
+ file << "Projection REF " << image->GetProjectionRef() << std::endl;
+
+ file << "GCP Projection " << image->GetGCPProjection() << std::endl;
+
+ unsigned int GCPCount = image->GetGCPCount();
+ file << "GCP Count " << image->GetGCPCount() << std::endl;
+
+// SoftwareGuide: EndCodeSnippet
+// SoftwareGuide: BeginLatex
+//
+// One can also get the GCPs by number, as well as their coordinates
+// in image and geographical space.
+//
+// SoftwareGuide: EndLatex
+
+// SoftwareGuide: BeginCodeSnippet
+
+ for(unsigned int GCPnum = 0 ; GCPnum < GCPCount ; GCPnum++ )
+ {
+ file << "GCP[" << GCPnum << "] Id " << image->GetGCPId(GCPnum) << std::endl;
+ file << "GCP[" << GCPnum << "] Info " << image->GetGCPInfo(GCPnum) << std::endl;
+ file << "GCP[" << GCPnum << "] Row " << image->GetGCPRow(GCPnum) << std::endl;
+ file << "GCP[" << GCPnum << "] Col " << image->GetGCPCol(GCPnum) << std::endl;
+ file << "GCP[" << GCPnum << "] X " << image->GetGCPX(GCPnum) << std::endl;
+ file << "GCP[" << GCPnum << "] Y " << image->GetGCPY(GCPnum) << std::endl;
+ file << "GCP[" << GCPnum << "] Z " << image->GetGCPZ(GCPnum) << std::endl;
+ file << "----------------" << std::endl;
+ }
+
+// SoftwareGuide: EndCodeSnippet
+// SoftwareGuide: BeginLatex
+//
+// If a geographical transformation is available, it can be recovered
+// as follows.
+//
+// SoftwareGuide: EndLatex
+
+// SoftwareGuide: BeginCodeSnippet
+
+ InputImageType::VectorType tab = image->GetGeoTransform();
+
+ file << "Geo Transform " << std::endl;
+ for(int i = 0 ; i < tab.size() ; i++ )
+ {
+ file << " " <<i<<" -> "<<tab[i]<< std::endl;
+ }
+ tab.clear();
+
+ tab = image->GetUpperLeftCorner();
+ file << "Corners " << std::endl;
+ for(int i = 0 ; i < tab.size() ; i++ )
+ {
+ file << " UL[" <<i<<"] -> "<<tab[i]<< std::endl;
+ }
+ tab.clear();
+
+ tab = image->GetUpperRightCorner();
+ for(int i = 0 ; i < tab.size() ; i++ )
+ {
+ file << " UR[" <<i<<"] -> "<<tab[i]<< std::endl;
+ }
+ tab.clear();
+
+ tab = image->GetLowerLeftCorner();
+ for(int i = 0 ; i < tab.size() ; i++ )
+ {
+ file << " LL[" <<i<<"] -> "<<tab[i]<< std::endl;
+ }
+ tab.clear();
+
+ tab = image->GetLowerRightCorner();
+ for(int i = 0 ; i < tab.size() ; i++ )
+ {
+ file << " LR[" <<i<<"] -> "<<tab[i]<< std::endl;
+ }
+ tab.clear();
+
+ file.close();
+
+ // SoftwareGuide: EndCodeSnippet
+ return EXIT_SUCCESS;
+}
+
--
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