[Insight-users] Overwriting TIFF files

[Bill Lorensen]

Sebastien,

This looks like a bug to me. I can't see itkTIFFImageIO closing the file.
Also, the write should not silently fail.
Please enter a bug report:
http://public.kitware.com/Bug/my_view_page.php

Bill

On Dec 13, 2007 12:56 PM, Sébastien Fricker <sebastien.fricker at phaseview.net>
wrote:

> Thank you Xabi,
> I have already tested writing to a different name and it works just fine.
> Only when input name == output name do I get a problem: the original file
> is
> not modified.
>
> The part of the code that fails is in Itktiffimageio.cxx, in the
> TIFFImageIO::InternalWrite function.
> The problem appears at the following piece of code:
>
>  TIFF *tif = TIFFOpen(m_FileName.c_str(), "w");
>  if ( !tif )
>    {
>    itkDebugMacro( << "Returning" );
>    return;
>    }
>
> In my case !tif == true because the image was already open at the
> beginning
> of the pipeline.
>
> Surprisingly it works with BMP images though. Does this mean TIFF files
> cannot be modified in-place?
>
> Sebastien
>
> -----Original Message-----
> From: insight-users-bounces+sebastien.fricker=phaseview.net at itk.org
> [mailto:insight-users-bounces+sebastien.fricker=phaseview.net at itk.org] On
> Behalf Of Xabier Artaechevarria Artieda
> Sent: jeudi 13 décembre 2007 18:21
> To: insight-users at itk.org
> Subject: Re: [Insight-users] Overwriting TIFF files
>
> Hi Sébastien,
> I think I have done this, sometimes without even realising :(
> Try writing with a different name to see if that is the  problem.
> Good luck,
> Xabi
>
> --
> Xabier Artaechevarria
> Cancer Imaging Laboratory
> Centre for Applied Medical Research
> www.cima.es
>
>
>
> Sébastien Fricker <sebastien.fricker at phaseview.net> ha escrito:
>
> > Dear ITK users,
> >
> > I wrote a program that opens an image, transforms it via the Resample
> image
> > filter and writes the result to the original image file (see code
> fragment
> > below).
> >
> > This works fine when I use BMP images.
> >
> > It does not work when I use TIF images: the original image is not
> modified.
> > What happens is that the writer at the end does not do anything:
> apparently
> > it cannot open the image for writing, probably because the same image
> was
> > open for reading at the beginning of the pipeline.
> >
> >
> >
> > Is this a bug or am I doing something wrong?
> >
> > How can I modify a TIF file in-place?
> >
> >
> >
> > Thanks for any hint.
> >
> >
> >
> > Sebastien
> >
> >
> >
> > CODE FRAGMENT:
> >
> >
> >
> > --------------------------------------------------------
> >
> >
> >
> > //DEFINE IMAGE TYPES
> >
> > const unsigned int Dimension = 2;
> >
> > typedef unsigned short PixelType;
> >
> > typedef double InternalPixelType;
> >
> > typedef itk::Image< PixelType, Dimension > ImageType;
> >
> > typedef itk::Image< InternalPixelType, Dimension > InternalImageType;
> >
> >
> >
> > //READ INPUT IMAGE
> >
> > typedef itk::ImageFileReader< ImageType  > ImageReaderType;
> >
> > ImageReaderType::Pointer  inputImageReader  = ImageReaderType::New();
> >
> >
> >
> > inputImageReader->SetFileName( fileName );
> >
> > inputImageReader->Update();
> >
> > ImageType::Pointer inputImage = inputImageReader->GetOutput();
> >
> >
> >
> >
> >
> > //RESAMPLE IMAGE
> >
> > //Define filter, create one instance
> >
> > typedef itk::ResampleImageFilter< InternalImageType, InternalImageType >
> > ResampleFilterType;
> >
> > ResampleFilterType::Pointer resampler = ResampleFilterType::New();
> >
> >
> >
> > resampler->SetInput( inputImage );
> >
> >
> >
> > //MORE CODE HERE TO SET RESAMPLER PARAMETERS …
> >
> >
> >
> >
> >
> > //CAST IMAGE TO OUTPUT TYPE
> >
> > typedef itk::CastImageFilter<
> >
> >                              InternalImageType,
> >
> >                              ImageType > CastFilterType;
> >
> > CastFilterType::Pointer  caster =  CastFilterType::New();
> >
> >
> >
> > caster->SetInput( resampler->GetOutput() );
> >
> >
> >
> > //WRITE OUTPUT FILE
> >
> > typedef itk::ImageFileWriter< ImageType >  WriterType;
> >
> > WriterType::Pointer      writer =  WriterType::New();
> >
> >
> >
> > writer->SetFileName( fileName );
> >
> > writer->SetInput( caster->GetOutput() );
> >
> > writer->Update();
> >
> >
> >
> > --------------------------------------------------------
> >
> >
> >
> >
> >
> >
>
>
>
> ----------------------------------------------------------------
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>
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