[Insight-users] Huge performance of time delay on BinaryDilateImageFilter

[Gaëtan Lehmann]

Le 4 mai 07 à 11:22, Alireza Salamy a écrit :

> Dear Gaetan,
> For erosion it takes around 93 second but for dilation it takes  
> around 45 minute.

There is definitively a problem. Can you check if you have an old  
version of itkBinaryMorphologyImageFilter.txx (without the patch I  
made a couple of days ago) somewhere?
It can be the problem.

> but  I have two question here:the first is if the  binaryopening by  
> reconstruction filter do exactly the same as erosion follow by  
> dilation?

it does an erosion, followed by a reconstruction by dilation.

> The second question which is very important to me is why your  
> Binary opening by reconstruction filter doesn't work well when I  
> add subtract image filter to the end of algorithm to subtract the  
> image before opening and the image after opening?(I mean I can  
> build it successfully but when I try to implement it it do the  
> opening but when it reach the subtract filter it stop.)my input  
> image is 3D volum image
> I add the following line to the end of binary opening by  
> reconstruction image filater.
>
> typedef itk::SubtractImageFilter<
>                                   IType,
>                                   IType,
>                                   IType > DifferenceFilterType;
>   DifferenceFilterType::Pointer difference =  
> DifferenceFilterType::New();
>   difference->SetInput1( reader->GetOutput() );
>   difference->SetInput2( reconstruction->GetOutput() );
>
>   WriterType::Pointer writer2 = WriterType::New();
>   writer2->SetInput( difference->GetOutput() );
>   writer2->SetFileName( argv[7] );
>   writer2->Update();
> please let me know how can I solve this problem because it is very  
> important for me.
> thanks in advance
>  Alireza

It is fixed now - see my other email :-)

Gaëtan


>
> Gaëtan Lehmann <gaetan.lehmann at jouy.inra.fr> wrote:
>
> Hi Alireza,
>
> Because of the algorithm used in those filters, it is possible to
> have a different execution time. However, the difference are
> generally small.
> Can you give more detail about what you call "quick" and "very long
> time"?
>
> Thanks,
>
> Gaëtan
>
>
> Le 3 mai 07 à 16:03, Alireza Salamy a écrit :
>
> > Hi all users,
> > I am trying to do dilatation by BinaryDilateImageFilterTest on the
> > image which is the output of the BinaryErodeImageFilterTest.the
> > first filter( BinaryErodeImageFilterTest) works very quick but when
> > I try to implement the second filter(BinaryDilateImageFilterTest)
> > it takes very long time.in both filter I chose the radius=5.can
> > somebody let me know what is wrong with that?
> >
> > Ahhh...imagining that irresistible "new car" smell?
> > Check out new cars at Yahoo! Autos.
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
>
> --
> Gaëtan Lehmann
> Biologie du Développement et de la Reproduction
> INRA de Jouy-en-Josas (France)
> tel: +33 1 34 65 29 66 fax: 01 34 65 29 09
> http://voxel.jouy.inra.fr
>
>
>
>
>
> Ahhh...imagining that irresistible "new car" smell?
> Check out new cars at Yahoo! Autos.

--
Gaëtan Lehmann
Biologie du Développement et de la Reproduction
INRA de Jouy-en-Josas (France)
tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
http://voxel.jouy.inra.fr



-------------- next part --------------
A non-text attachment was scrubbed...
Name: PGP.sig
Type: application/pgp-signature
Size: 186 bytes
Desc: =?ISO-8859-1?Q?Ceci_est_une_signature_=E9lectronique_PGP?=
Url : http://public.kitware.com/pipermail/insight-users/attachments/20070504/47105cc0/PGP.pgp