[Insight-users] Big performance difference reading DICOM files using itkImageSeriesReader or vtkGDCMImageReader

[Roger Bramon Feixas]

Hi,

Anyone have any idea to solve the problem exposed?

Thanks,

Roger

On Wed, Feb 16, 2011 at 11:51 AM, Roger Bramon Feixas <rogerbramon at gmail.com
> wrote:

> Hi,
>
> I'm developing with ITK 3.20 + GDCM 2.0.17 + VTK 5.6 and I've noticed
> itkImageSeriesReader is ~2x slower than vtkGDCMImageReader (from GDCM2). I
> compared both codes and I think the difference is the extra copy which
> itkImageSeriesReader makes from ImageFileReader's output to its own output
> (ImageSeriesReader::GenerateData() line 393). I've commented it just to test
> the time needed without making the copy and now both readers take more or
> less the same time.
>
> Is there a way to avoid the copy? I mean, could ImageFileReader write into
> the itkImageSeriesReader's output allocated memory directly?
>
> I've also attached a test program if someone want to test it.
>
> Thanks for your attention,
>
> Roger
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.itk.org/pipermail/insight-users/attachments/20110322/688d0a85/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: performanceReading.zip
Type: application/zip
Size: 3833 bytes
Desc: not available
URL: <http://www.itk.org/pipermail/insight-users/attachments/20110322/688d0a85/attachment.zip>