[Insight-users] What is a good image format for ITK: sorry

[Mathieu Malaterre]

Ouuuups,
	Sorry I was modifying ImageReadExtractWrite.cxx while starting 
ImageReadCastWrite ... I have been able to reproduce the bug. I'll track 
it down.

Thanks and sorry again,
mathieu

Mathieu Malaterre wrote:
> Hideaki Hiraki,
>     
>     I am sorry but I can't reproduce the bug you mention. I am also 
> sorry to ask you this question: Are you sure you change:
> 
> 
>   typedef float               InputPixelType;
> into
>   typedef char               InputPixelType;
> 
> in the file ImageReadCastWrite.cxx ?
> 
> Mathieu
> 
> 
> hhiraki at lab . nig . ac . jp wrote:
> 
>> Hi Mathieu,
>>
>> I tried a cvs version. It's on a pentium3 linux box with gcc-3.2.
>> Thanks to Stephen R. Aylward, MetaImageIO had already fixed. The other 
>> two can be reproduced with Examples/IO/ImageCastReadWrite.cxx
>> and Examples/Data/BrainT1Slice.png.
>>
>>
>> On VTKImageIO, as the default format had been changed to binary, 
>> ImageCastReadWrite.cxx had to be changed to reproduce the flaw.
>> Fow example:
>>
>> --- ImageReadCastWrite.cxx~    Wed May 28 14:49:52 2003
>> +++ ImageReadCastWrite.cxx    Wed May 28 15:06:27 2003
>> @@ -205,6 +205,8 @@
>>    try      {      writer->Update(); +    
>> writer->GetImageIO()->SetFileTypeToASCII();
>> +    writer->Update();      }    catch( itk::ExceptionObject & err ) 
>>      {
>> Then try:
>>
>> $ ImageReadCastWrite BrainT1Slice.png foobar.vtk
>>
>> The result file foobar.vtk causes an error in VTK:
>>
>> $ vtk
>> % vtkStructuredPointsReader reader
>> reader
>> % reader SetFileName foobar.vtk
>> % reader Update
>> Generic Warning: In /tmp/src/VTK/IO/vtkDataReader.cxx, line 833
>> Error reading ascii data!
>>
>>
>> On AnalyzeImageIO, convert the image through AnalyzeIO:
>>
>> $ ImageReadCastWrite BrainT1Slice.png foobar.hdr
>> $ ImageReadCastWrite foobar.hdr foobar.png
>>
>> Then, the grayscale of the result foobar.png was overflowed at the 
>> value 128.
>>
>> By the way, I think signed 8bit integer pixel type must be
>> explicit "signed char" rather than platform-dependent "char".
>>
>> Regards,
>>
>> Hideaki Hiraki
>>
>>
>> Mathieu Malaterre wrote:
>>
>>> Hideaki Hiraki,
>>>
>>> There has been quite a lot of bug fix since ITK1.2 in all of the 
>>> ImageIO you are talking about:
>>>
>>> http://public . kitware . com/cgi-bin/cvsweb . cgi/Insight/Code/IO/itkVTKImageIO . cxx?cvsroot=Insight 
>>>
>>> http://public . kitware . com/cgi-bin/cvsweb . cgi/Insight/Code/IO/itkAnalyzeImageIO . cxx?cvsroot=Insight 
>>>
>>> http://public . kitware . com/cgi-bin/cvsweb . cgi/Insight/Code/IO/itkMetaImageIO . cxx?cvsroot=Insight 
>>>
>>>
>>> Could you please try a CVS version of ITK ? And if this is still not 
>>> working could you give us a short example on how to reproduce each 
>>> bugs, thanks ?
>>>
>>
>>
> 
> 


-- 
Mathieu Malaterre
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