[ITK-users] compressing MetaImages bigger than 4GB leads to data loss

[brian avants]

i think that i have seen this as well, on linux or maybe osx using
nii.gz.  will get back with an example if i can dig it up.

brian




On Wed, Jun 25, 2014 at 8:24 AM, Bradley Lowekamp
<blowekamp at mail.nih.gov> wrote:
> Hello,
>
> That sounds like a bug to me. What OS? version of ITK? Are you using ITK's zlib?
>
> Brad
>
> On Jun 25, 2014, at 8:16 AM, Dr. Roman Grothausmann <grothausmann.roman at mh-hannover.de> wrote:
>
>> Dear mailing list members,
>>
>>
>> Working with a labelled tomogram that is larger than 4GB made me realize that when saving the data as a compressed MetaImage (mhd) leads to a complete data loss. It seems the way libz is used that files bigger than 4GB are compressed incorrectly. If that's not possible the itkFileWriter should issue an error in case an image is bigger than 4GB. So far it just goes on as if nothing would be wrong and only when opening the image again the reader reports that "Uncompress failed".
>> Is this a bug?
>>
>> Just as a side node: writing the same file as a compressed TIFF works fine, though e.g. imagej/fiji opens the file with MSB swapped.
>>
>> Any help or hints are very much appreciated
>> Roman
>>
>> --
>> Dr. Roman Grothausmann
>>
>> Tomographie und Digitale Bildverarbeitung
>> Tomography and Digital Image Analysis
>>
>> Institut für Funktionelle und Angewandte Anatomie, OE 4120
>> Medizinische Hochschule Hannover
>> Carl-Neuberg-Str. 1
>> D-30625 Hannover
>>
>> Tel. +49 511 532-9574
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