[vtkusers] vtkTiffWriter does not write 3d volume

[Richard Whitehead]

The vtkTiffWriter does not set the "number of pages" in a tiff file.  If
you try to write a 3d volume you get a single 2d slice whose height is
(image height * number of slices).

Example code:

        const char* filename = "C:\\temp\\out.tiff";

int extents[6] = {0, 9, 0, 9, 0, 9};
vtkSmartPointer<vtkImageData> imageVolume =
vtkSmartPointer<vtkImageData>::New();
imageVolume->SetExtent(extents);
imageVolume->AllocateScalars(VTK_UNSIGNED_SHORT, 1);

vtkSmartPointer<vtkTIFFWriter> writer =
vtkSmartPointer<vtkTIFFWriter>::New();
writer->SetInputData( imageVolume );
writer->SetFileDimensionality(3);
writer->SetCompressionToNoCompression();
writer->SetFileName( filename );
writer->Write();

vtkSmartPointer<vtkTIFFReader> reader =
vtkSmartPointer<vtkTIFFReader>::New();
reader->SetFileName( filename );
reader->SetFileDimensionality(3);
reader->Update();
reader->GetDataExtent(extents);  // returns { 0, 9, 0, 99, 0, 0 }


I don't really understand what's happening, for example I can see the
writer setting TIFFTAG_IMAGELENGTH to the image height, but when the reader
reads the same tag it gets (height * number of slices).

This is in VTK 6.1.0.
Can anyone suggest how to fix this??

Many thanks,

Richard



-- 

Richard Whitehead *–* Senior Imaging Engineer

*Michelson Diagnostics Ltd*

*M:* +44 (0)7905 955276   *T:* +44 (0)20 8308 1695

*E: *richard.whitehead at vivosight.com   *W:* www.vivosight.com


<http://www.vivosight.com/>


Michelson Diagnostics Ltd, 1 Grays Farm Production Village, Grays Farm
Road, Orpington, Kent  BR5 3BD, UK

Registered Office: 3 Shearwater, Maidstone, ME16 0DW.     Registered in
England No. 5732681
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