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

[Dr. Roman Grothausmann]

Dear Brad,

On 25/06/14 14:24, Bradley Lowekamp wrote:
> That sounds like a bug to me. What OS? version of ITK? Are you using ITK's zlib?

Linux, Debian 7.2, self compiled itk-4.5.1 (problem also exists with itk-4.4.0), 
I tried both ITK's zlib and system zlib, same problem for both.

I also tested system libtiff. In that case the ITKwriter/libtiff throws an error 
that the file is too large for the TIFF-Standard, just as it should be.

Many thanks for looking into this.
Roman

> 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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-- 
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
_____________________________________
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

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