[Insight-users] MetaImageIO problem

[Luis Ibanez]

Hi Peter,

I committed to ITK the tests for images larger than 2Gb.

http://www.itk.org/cgi-bin/viewcvs.cgi/Testing/Code/IO/itkLargeImageWriteReadTest.cxx?root=Insight&sortby=date&view=log


You can enable them by setting the (Advanced)
CMake variable

       ITK_COMPUTER_MEMORY_SIZE

to the size of your RAM memory in GigaBytes.

The tests are run in computers with more than
3Gb of RAM.

As you pointed out, the case of MetaImages
larger than 2GB is not working properly.

(The case of image size = 1.7Gb works fine)



We will be tracking the problem...

It will be great if you could report this as
a bug in the bug tracker:

http://public.kitware.com/Bug/my_view_page.php



    Thanks


       Luis



------------------
Peter Varga wrote:
> Dear Luis,
> 
> thank you very much for your fast answer!
> I'm really interested in the result of your test.
> Thank you for spending time on this issue.
> 
> Regards,
> Peter
> 
> 
> Luis Ibanez wrote:
> 
>>Hi Peter,
>>
>>I just checked with the developers of the MetaImage library
>>and although the library builds fine in 64 bits machines,
>>to our knowledge it has not been used with files larger
>>than 2 Gb.
>>
>>I will give it a shot at creating a synthetic image of that
>>size, and will let you know how it goes. Depending on the
>>outcome of that experiment we will have to log on a bug
>>report for the MetaImage library.
>>
>>
>>  Thanks for the report.
>>
>>
>>      Luis
>>
>>
>>--------------------
>>Peter Varga wrote:
>>
>>>Dear Luis Ibanez,
>>>
>>>I'm Peter Varga, PhD student at the TU Vienna, Austria.
>>>I've currently started to work with ITK and find it a very
>>>nice efficient tool!
>>>I would like to ask for your help as I'm stuck a bit with a
>>>problem that I cannot go around...
>>>I'm working with big 3D images and using the '.mha' and
>>>'.mhd' formats on 64bit linux and unix systems. When
>>>reading and writing I'm using the itkImageFileReader
>>>and itkImageFileWriter classes and if I understand
>>>correctly in case of a meta-image these processes
>>>are re-directed to the MetaImageIO class.
>>>I read that MetaImageIO can take advantage of the 64bit
>>>systems. Still, I have problems when writing (maybe also
>>>when reading...) files with size bigger than 2GB: either
>>>only the ASCII header is written or the raw data is not
>>>complete.
>>>As I compiled ITK on 64 bit, when reading and processing
>>>the data the memory usage can go far above 2GB, so
>>>there might be problems only with the writing issues (I didn't
>>>check if the data was read correctly at all as I don't see the
>>>output of the code).
>>>Have you ever experienced anything like this?
>>>Could you help figuring out what the problem is?
>>>
>>>Thank you in advance for your help!
>>>
>>>Best regards,
>>>
>>>Peter Varga
>>>--------------------------------------------------------------------------------------------------------
>>>
>>>Institute for Lightweight Design and Structural Biomechanics
>>>Vienna University of Technology (TU-Wien)
>>>Gusshausstrasse 27-29
>>>A-1040 Vienna
>>>Austria
>>>Tel. +43 1 58801 317 32
>>>Fax +43 1 58801 317 99
>>>E-mail: vpeter at ilsb.tuwien.ac.at
>>>
>>>
> 
> 
>