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<p class=MsoNormal>Hi VTK Users,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-GB>I am trying to view a 3d itk RGBA image or
RGB image. Below is the pipeline followed by problem. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New";color:green'>itkImageFileReader
==> itkVTKImageExport ==> vtkImageImport ==> vtkImageActor<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New";color:green'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New";color:blue'> typedef</span><span
lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>
itk::RGBAPixel< <span style='color:blue'>unsigned</span> <span
style='color:blue'>char</span> > PixelType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>typedef</span>
itk::Image< PixelType, 3 > ImageType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>typedef</span>
itk::ImageFileReader< ImageType > ReaderType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ReaderType::Pointer
reader = ReaderType::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> reader->SetFileName(
argv[1] );<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> reader->Update();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span
style='color:green'>// Obtain center index of the image<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>//
<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageType::Pointer
inputImage = reader->GetOutput();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageType::SizeType
size = inputImage->GetBufferedRegion().GetSize();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageType::IndexType
start = inputImage->GetBufferedRegion().GetIndex();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>typedef</span>
itk::VTKImageExport< ImageType > ExportFilterType;<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'>
ExportFilterType::Pointer itkExporter = ExportFilterType::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> itkExporter->SetInput(
reader->GetOutput() );<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>//
Create the vtkImageImport and connect it to the<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>//
itk::VTKImageExport instance.<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> vtkImageImport*
vtkImporter = vtkImageImport::New(); <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'>
ConnectPipelines(itkExporter, vtkImporter);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>//------------------------------------------------------------------------<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>//
VTK pipeline.<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>//------------------------------------------------------------------------<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:green'>//
Create a renderer, render window, and render window interactor to<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> </span><span
style='font-size:10.0pt;font-family:"Courier New";color:green'>// display the
results.<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'> vtkRenderer* renderer = vtkRenderer::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'> vtkRenderWindow* renWin =
vtkRenderWindow::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'> vtkRenderWindowInteractor* iren =
vtkRenderWindowInteractor::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> vtkLookupTable *lut =
vtkLookupTable::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> lut->SetHueRange(0.66667,0.0);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> lut->SetSaturationRange(1,
1);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> lut->SetValueRange(1,
1);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> lut->SetAlphaRange(1,
1);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> lut->SetNumberOfColors(128);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> lut->Build();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <span
style='color:green'>//set vtkimageviewer<o:p></o:p></span></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> vtkImageViewer2*
ImageViewer = vtkImageViewer2::New();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->SetInput(vtkImporter->GetOutput()
);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->SetSize(500,500);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->SetupInteractor(iren);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->GetRenderer()->SetBackground(0.4392,
0.5020, 0.5647);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->GetWindowLevel()->SetOutputFormatToRGBA();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->GetWindowLevel()->SetLookupTable(lut);
<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->SetSlice(slicenumber);<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> ImageViewer->SetSliceOrientationToXY();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> <o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span lang=EN-GB
style='font-size:10.0pt;font-family:"Courier New"'> </span><span
style='font-size:10.0pt;font-family:"Courier New"'>ImageViewer->GetRenderer()->ResetCamera();<o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'> ImageViewer->GetRenderWindow()->Render();<o:p></o:p></span></p>
<div style='mso-element:para-border-div;border:none;border-bottom:double windowtext 2.25pt;
padding:0cm 0cm 1.0pt 0cm'>
<p class=MsoNormal style='border:none;padding:0cm'><span style='font-size:10.0pt;
font-family:"Courier New"'>
ImageViewer->GetRenderWindow()->GetInteractor()->Start();</span><o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-GB>The result only red and blue colour which
is not true. There should be green and other colour. What am i doing wrong ?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Any quick help is highly appreciated.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Thank you,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>Regards,<o:p></o:p></span></p>
<p class=MsoNormal>Kana Arunachalam Kannappan<o:p></o:p></p>
<p class=MsoNormal>Research Associate<o:p></o:p></p>
<p class=MsoNormal>FH OÖ Forschungs & Entwicklungs GmbH<o:p></o:p></p>
<p class=MsoNormal>Stelzhamer Strasse 23,<o:p></o:p></p>
<p class=MsoNormal>4600 Wels,<o:p></o:p></p>
<p class=MsoNormal>Austria.<o:p></o:p></p>
<p class=MsoNormal>Phone: +43 (0)7242 72811 -4420<o:p></o:p></p>
<p class=MsoNormal>kana.arunachalam@fh-wels.at<o:p></o:p></p>
<p class=MsoNormal>www.fh-ooe.at; www.3dct.at<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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