ADD: add test for VCAImageFilter

Testing/otbVCAImageFilter.cxx

+/*=========================================================================
+
+  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.
+
+=========================================================================*/
+#include "otbVectorImage.h"
+#include "otbImageFileReader.h"
+#include "otbImageFileWriter.h"
+
+#include "otbVcaImageFilter.h"
+
+const unsigned int Dimension = 2;
+typedef double PixelType;
+typedef double PrecisionType;
+
+typedef otb::Image<PixelType, Dimension> ImageType;
+typedef otb::VectorImage<PixelType, Dimension> VectorImageType;
+typedef otb::VCAImageFilter<VectorImageType> VCAFilterType;
+
+typedef otb::ImageFileReader<VectorImageType> ReaderType;
+typedef otb::ImageFileWriter<VectorImageType> WriterType;
+
+int otbVCAImageFilterTestHighSNR(int argc, char * argv[])
+{
+  const char * inputImage = argv[1];
+  const char * outputImage = argv[2];
+  const unsigned int nbEndmembers = atoi(argv[3]);
+
+  ReaderType::Pointer readerImage = ReaderType::New();
+  readerImage->SetFileName(inputImage);
+
+  VCAFilterType::Pointer vca = VCAFilterType::New();
+  vca->SetNumberOfEndmembers(nbEndmembers);
+  vca->SetInput(readerImage->GetOutput());
+
+  WriterType::Pointer writer = WriterType::New();
+  writer->SetFileName(outputImage);
+  writer->SetInput(vca->GetOutput());
+  writer->Update();
+
+  return EXIT_SUCCESS;
+}