[Insight-users] itkScalarChanAndVeseSparseLevelSetImageFilter - RMS Change

Thu Sep 10 11:59:25 EDT 2009

Hi Kishore,
yes, the problem with the range was solved.

Thank you,
Eleni

-----Original Message-----
From: Kishore Mosaliganti [mailto:kishoreraom at gmail.com]
Sent: Thu 9/10/2009 8:41 AM
To: Sgouritsa, Eleni ; insight-users at itk.org
Subject: Re: [Insight-users] itkScalarChanAndVeseSparseLevelSetImageFilter - RMS Change

Hi Eleni,

Can you confirm if it solves your problem.

Kishore

On Wed, Sep 9, 2009 at 9:18 PM, Kishore Mosaliganti
<kishoreraom at gmail.com>wrote:

> 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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