[Insight-users] itkScalarChanAndVeseSparseLevelSetImageFilter - RMS Change

[Kishore Mosaliganti]

Hi Eleni,

Thanks for pointing that out. It escaped my attention. I fixed that in the
CVS version.

Kishore

On Wed, Sep 9, 2009 at 6:46 PM, Sgouritsa, Eleni <esgourit at central.uh.edu>wrote:

>  Hello Kishore,
>
> I downloaded the latest CVS version. When I run my program it always fails
> in a specific place: itkMultiphaseSparseFiniteDifferenceImageFilter.txx,
> UpdateActiveLayerValues function, line 508, reporting the following
> error:"vector subscript out of range". It seems to me that m_PixelDistance
> is a 6-dimensional array and it tries to get m_PixelDistance[6], that is a
> non accurate position. Could it be possible to check if you have the same
> problem?
> Thanks again for your time and help.
>
> Regards,
> Eleni
>
>
> -----Original Message-----
> From: Sgouritsa, Eleni
> Sent: Tue 9/8/2009 3:23 PM
> To: Kishore Mosaliganti
> Cc: insight-users at itk.org
> Subject: RE: [Insight-users] itkScalarChanAndVeseSparseLevelSetImageFilter
> - RMS Change
>
> Hello Kishore,
> thank you very much.
>
> Eleni
>
>
> -----Original Message-----
> From: Kishore Mosaliganti [mailto:kishoreraom at gmail.com<kishoreraom at gmail.com>
> ]
> Sent: Tue 9/8/2009 3:11 PM
> To: Sgouritsa, Eleni
> Cc: insight-users at itk.org
> Subject: Re: [Insight-users] itkScalarChanAndVeseSparseLevelSetImageFilter
> - RMS Change
>
> Hi Eleni,
>
> The RMS change values are now computed after reinitialization to signed
> distance functions. So, it will now show up as small values. Remember to
> download the latest CVS version.
>
> Kishore
>
> On Mon, Sep 7, 2009 at 8:06 PM, Sgouritsa, Eleni <esgourit at central.uh.edu
> >wrote:
>
> >  Hello Kishore,
> > I am sorry for the multiple e-mails. Please let me know about any
> progress
> > in the issue with the high RMS change values. Do you also face the same
> > problem?
> >
> > Best regards,
> > Eleni
> >
> >
> > -----Original Message-----
> > From: Sgouritsa, Eleni
> > Sent: Tue 8/25/2009 12:40 PM
> > To: Kishore Mosaliganti; insight-users at itk.org
> > Subject: RE: [Insight-users]
> itkScalarChanAndVeseSparseLevelSetImageFilter
> > - RMS Change
> >
> > Hello Kishore,
> > do you have any updates?
> >
> > Best wishes,
> > Eleni
> >
> >
> > -----Original Message-----
> > From: Sgouritsa, Eleni
> > Sent: Tue 8/18/2009 9:59 AM
> > To: Kishore Mosaliganti; insight-users at itk.org
> > Subject: RE: [Insight-users]
> itkScalarChanAndVeseSparseLevelSetImageFilter
> > - RMS Change
> >
> > Hello Kishore,
> >
> > thank you for your answer. Let me clarify myself: I am currently just
> > working on the sparse case. My problem is that I get very high values of
> RMS
> > Change between
> > the iterations of the level set. As you said, RMS values are used for
> > indicating the convergence of the evolution. I would expect them to be
> > around lets say 0.1 near convergence but I get all the time very high
> > changes during the evolution, RMS change values like 263450, meaning huge
> > numbers.
> > Do you know why is this happening?
> > Thank you very much.
> >
> > Regards,
> > Eleni
> >
> >
> > -----Original Message-----
> > From: Kishore Mosaliganti [mailto:kishoreraom at gmail.com<kishoreraom at gmail.com>
> <kishoreraom at gmail.com>
> > ]
> > Sent: Tue 8/18/2009 9:07 AM
> > To: Sgouritsa, Eleni ; insight-users at itk.org
> > Subject: Re: [Insight-users]
> itkScalarChanAndVeseSparseLevelSetImageFilter
> > - RMS Change
> >
> > Hi Eleni,
> >
> > I am back at work :).
> >
> > Ok, we made several corrections to the code in the past two months and
> you
> > can download the latest CVS version. Many thanks for your feedback on
> using
> > the code. It helped us identify bugs and clean up the code further.
> >
> > Your question was regarding the RMS Error values computed by the Dense
> and
> > Sparse filters on the same image producing different values.
> >
> > The dense filter works on the levelset function defined on the whole
> image
> > domain. As a result, the RMS values are computed on changes in the
> function
> > everywhere.
> >
> > The sparse filter works only locally to the 0 level-set (hence the name
> > sparse). The RMS values look at a small band of pixels. Therefore, the
> > values in this case are at a different range.
> >
> > Irrespective, the RMS values are used for indicating the convergence of
> the
> > evolution. Is there any reason why you want them to be at the same range
> ?
> >
> > Best,
> > Kishore
> >
> > On Mon, Aug 17, 2009 at 6:37 PM, Sgouritsa, Eleni
> > <esgourit at central.uh.edu>wrote:
> >
> > >  Hello,
> > > I hope everything went well concerning the embassy.
> > > Do you have any updates for the high RMS values? Was this problem
> fixed?
> > >
> > > Regards,
> > > Eleni
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: alex gouaillard [mailto:alexandre_gouaillard at hms.harvard.edu<alexandre_gouaillard at hms.harvard.edu>
> <alexandre_gouaillard at hms.harvard.edu>
> > <alexandre_gouaillard at hms.harvard.edu>
> > > ]
> > > Sent: Thu 7/2/2009 2:32 PM
> > > To: Sgouritsa, Eleni
> > > Cc: insight-users at itk.org
> > > Subject: Re: [Insight-users]
> > itkScalarChanAndVeseSparseLevelSetImageFilter
> > > - RMS Change
> > >
> > > hi eleni,
> > >
> > > Kishore has been release by the US embassy in India (without any
> > > ransom shall I had) and should be back in town july 9th.
> > >
> > > We will adress this issue right after that and keep you informed.
> > >
> > > thanks again for your feedback.
> > >
> > > alex.
> > >
> > >
> > > On Jul 2, 2009, at 12:53 PM, Sgouritsa, Eleni wrote:
> > >
> > > > Hello,
> > > > I still have a problem with very high values of RMS Change between
> > > > the iterations of the level set. Any help or direction on how to
> > > > solve this would be appreciated a lot.
> > > > Thank you very much.
> > > >
> > > > Best regards,
> > > > Eleni
> > > >
> > > > <ATT00001.txt>
> > >
> > >
> > >
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> >
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> >
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>
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