Perhaps the condition
<https://github.com/InsightSoftwareConsortium/ITK/blob/4456e0431b0d35f55eb1eadc5ca8a7c3fe2c8af9/Modules/IO/TIFF/src/itkTIFFImageIO.cxx#L595>
should be greater or equal? Because the equal case already wraps around
using signed arithmetic.
On Mon, Oct 23, 2017 at 9:15 AM, Lowekamp, Bradley (NIH/NLM/LHC) [C] <
***@mail.nih.gov> wrote:
> Hello,
>
> You have correctly figured this out. Technically the regular tiff format
> can support up to 4GB, but in ITK we made the determination to switch to
> the BigTiff format at 2GB [1]. This is does to ensure that we can properly
> do signed integer arithmetic for the file format.
>
> I have also used ImageJ/FIJI and a program call IMOD [2] (another electron
> microscopy viewer) for viewing these big tiff files.
>
> HTH,
> Brad
>
> [1] https://github.com/InsightSoftwareConsortium/ITK/blob/
> 4456e0431b0d35f55eb1eadc5ca8a7c3fe2c8af9/Modules/IO/TIFF/
> src/itkTIFFImageIO.cxx#L595
> [2] http://bio3d.colorado.edu/imod/
>
> On 10/21/17, 8:40 PM, "Gib Bogle" <***@auckland.ac.nz> wrote:
>
> I've managed to find the answer to one of my questions, by looking at
> the file header values. A TIFF file less than 2GB has these 4 header bytes:
> 49 49 2A 00
> and over 2GB (BigTIFF) has
> 49 49 2B 00
> ITK handles this automatically.
>
> I can view the big TIFFs with Fiji (ImageJ), so this is not a bad
> option for displaying the slices. What I like about Irfanview is that it's
> very light-weight. ImageJ loads the whole file into memory, which can take
> some time, while Irfanview loads one slice at a time.
>
> I am not keen about Slicer - it is a real heavy-weight - and Tomviz is
> very specialised, designed for viewing tomography data, i.e. images in a
> tilt series.
> ________________________________________
> From: Matt McCormick <***@kitware.com>
> Sent: Sunday, 22 October 2017 4:48 a.m.
> To: DÅŸenan ZukiÄ
> Cc: Gib Bogle; Insight-users
> Subject: Re: [ITK-users] Big tiff file
>
> Hi,
>
> Since ITKv4, support for "BigTiff" was added, so ITK can support TIFF
> files larger than 4GB.
>
> One possible limitation may be the filesystem -- avoid FAT32 formatted
> filesystem that will run into size limits.
>
> The file could be viewed with a number of ITK-supported viewers, e.g.
>
> - 3D-Slicer: https://www.slicer.org/
> - ITK-SNAP: http://www.itksnap.org/
> - Tomviz: http://www.tomviz.org/
>
> HTH,
> Matt
>
> On Sat, Oct 21, 2017 at 11:40 AM, DÅŸenan ZukiÄ <***@gmail.com>
> wrote:
> > Hi Gib,
> >
> > TIFF is limited to 4GiB. Unless you must use TIFF, better switch to
> > MetaImage or NRRD.
> >
> > Regards,
> > DÅŸenan
> >
> > On Sat, Oct 21, 2017 at 12:08 AM, Gib Bogle <***@auckland.ac.nz>
> wrote:
> >>
> >> Hi,
> >>
> >>
> >> I am joining a stack of 2D tiffs into a 3D tiff, and have run into a
> >> problem with big files. When the uncompressed size of the 3D file
> is more
> >> than 2GB I get an error when I try to view it with Irfanview. At
> first I
> >> thought maybe I needed to upgrade from ITK4.8.0, but after
> installing and
> >> using ITK4.12.2 I see that I have the same issue. Irfanview says:
> >>
> >> "Invalid or unsupported TIF file"
> >>
> >> I now suspect that the problem is not ITK-related, rather it is a
> >> limitation of Irfanview.
> >>
> >> I have two questions:
> >>
> >>
> >> Is there a limit on the allowed size of a tiff file?
> >>
> >> Is there another program (preferably free) that can open for
> viewing tiff
> >> files bigger than 2GB?
> >>
> >>
> >> It is useful but not essential for me to be able to view these big
> 3D
> >> files. I will use ITK functions to process the 3D files, and I'm
> assuming
> >> that any file that ITK can create it can also read.
> >>
> >>
> >> Thanks
> >>
> >> Gib
> >>
> >>
> >> The ITK community is transitioning from this mailing list to
> >> discourse.itk.org. Please join us there!
> >> ________________________________
> >> Powered by www.kitware.com
> >>
> >> Visit other Kitware open-source projects at
> >> http://www.kitware.com/opensource/opensource.html
> >>
> >> Kitware offers ITK Training Courses, for more information visit:
> >> http://www.kitware.com/products/protraining.php
> >>
> >> Please keep messages on-topic and check the ITK FAQ at:
> >> http://www.itk.org/Wiki/ITK_FAQ
> >>
> >> Follow this link to subscribe/unsubscribe:
> >> http://public.kitware.com/mailman/listinfo/insight-users
> >>
> >
> >
> > The ITK community is transitioning from this mailing list to
> > discourse.itk.org. Please join us there!
> > ________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Kitware offers ITK Training Courses, for more information visit:
> > http://www.kitware.com/products/protraining.php
> >
> > Please keep messages on-topic and check the ITK FAQ at:
> > http://www.itk.org/Wiki/ITK_FAQ
> >
> > Follow this link to subscribe/unsubscribe:
> > http://public.kitware.com/mailman/listinfo/insight-users
> >
> The ITK community is transitioning from this mailing list to
> discourse.itk.org. Please join us there!
> ________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Kitware offers ITK Training Courses, for more information visit:
> http://www.kitware.com/products/protraining.php
>
> Please keep messages on-topic and check the ITK FAQ at:
> http://www.itk.org/Wiki/ITK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/insight-users
>
>
>