[Insight-users] Heads up on HessianRecursiveGaussian bug fix

[Karthik Krishnan]

We do not update the downloads every time a bug is fixed. Its only done when
they cumulate to sufficient number. Please get the ITK-3-18 branch via CVS
and it should have the fix.

Thanks
--
karthik

On Mon, May 3, 2010 at 3:41 AM, Sergio Vera <sergio.vera at alma3d.com> wrote:

> Forgive me, but does this:
>
> *>and it has been backported today to the 3.18 branch by Luis*
>
> means that  fresh downloads of the ITK 3.18 have this bug corrected? As
> I've redownloaded it and the modification date for this files are old...
>
> Thanks
>
> On Wed, Apr 28, 2010 at 8:54 PM, Luca Antiga <luca.antiga at gmail.com>wrote:
>
>> Hi Rahul,
>>  the fixed itkHessianRecursiveGaussianImageFilter is in the ITK CVS
>> repository (Insight/Code/BasicFilters) and it has been backported today to
>> the 3.18 branch by Luis. The test is in Insight/Testing/Code/BasicFilters.
>> To test your program you'll have to checkout ITK from there and build it,
>> and then compile your program against it.
>>
>> As a cheap alternative for testing purposes, you can download the
>> incriminated file (
>> http://public.kitware.com/cgi-bin/viewcvs.cgi/Code/BasicFilters/itkHessianRecursiveGaussianImageFilter.txx?revision=1.10&root=Insight&view=markup)<http://public.kitware.com/cgi-bin/viewcvs.cgi/Code/BasicFilters/itkHessianRecursiveGaussianImageFilter.txx?revision=1.10&root=Insight&view=markup%29>,
>> put it in your own source tree at Insight/Code/BasicFilters (i.e. replacing
>> your own version of the file) and compile your program.
>>
>> Hope this helps
>>
>>
>> Luca
>>
>>
>>
>> On Apr 28, 2010, at 12:09 PM, Rahul P.Kumar wrote:
>>
>> Hi Luca,
>>
>> May I know where I can find the newly
>> fixed itkHessianRecursiveGaussianImageFilter
>> and tkHessianRecursiveGaussianImageFilterScaleSpaceTest for testing my
>> program?
>>
>> Regards,
>> Rahul
>>
>> ------------------------------
>> *From:* Luca Antiga <luca.antiga at gmail.com>
>> *To:* itk Users <insight-users at itk.org>
>> *Sent:* Wed, April 28, 2010 3:25:41 PM
>> *Subject:* [Insight-users] Heads up on HessianRecursiveGaussian bug fix
>>
>> Hi all,
>>  this is a heads up message on a bug that Oleksandr Dzyubak has found in
>> itkHessianRecursiveGaussianImageFilter
>> (bug 0008990 in Mantis, http://public.kitware.com/Bug/view.php?id=10599)<http://public.kitware.com/Bug/view.php?id=10599%29>
>>  and for which I recently submitted a fix.
>>
>> The bug affected the behavior of the filter when NormalizeAcrossScale is
>> set to true with dimensions > 2, and it has effects on multi-scale
>> vesselness filters or multi-scale shape-detection filters in general (e.g.
>> those using itk::MultiScaleHessianBasedMeasureImageFilter), and
>> vessel-enhancing diffusion filters.
>>
>> The bug caused incorrect normalization of the Hessian across scale-space,
>> and, for instance, lead to a poor performance of vesselness filters when
>> spanning several scales (vessels at smaller scales were washed out compared
>> to how they appear after the fix).
>>
>> The fix has been committed after 3.18 was released, hence it will be in
>> for ITK > 3.18. There is now a test
>> (itkHessianRecursiveGaussianImageFilterScaleSpaceTest) that tests the
>> scale-space behavior of the class quantitatively.
>>
>> So, for whoever was using multi-scale Hessian-based filters in 3D and
>> higher, please rerun your tests, since there's a very good chance (100% ?)
>> that the results will have changed (most likely for the better).
>>
>> I'm here for any clarification. Again, kudos to Oleksandr Dzyubak who
>> highlighted the misbehavior through lots of testing.
>>
>> Best regards
>>
>>
>> Luca
>>
>>
>>
>>   --
>> Luca Antiga, PhD
>> Principal Scientist, OROBIX Srl
>> via L.A. Muratori 3, 24123 Bergamo, Italy
>>
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>>
>>
>>
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>
>
> --
> Sergio Vera
>
> Alma IT Systems
> C/ Vilana, 4B, 4º 1ª
> 08022 Barcelona
> T. (+34) 932 380 592
> www.alma3d.com
>
> _____________________________________
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