[Insight-users] Results of itkCurvesLevelSetImageFilter

[Pingkun Yan]

Hi Luis,

Please see my response below.

Thanks!
Pingkun

>
> Hi Pingkun,
>
> Thanks for the clarification.
>
> Please post to the list the following:
>
> 1) The speed (feature) image that you passed to the Curves filter.

The speed image "edgePotential.png" is attached.

>
> 2) The "circle" image that you generated with FastMarching.

The image "initialLevelSet.png" is generated by fast marching, where I set 
the seed value as -3.5.

>
> 3) The parameter setting that you select when running the Curves
>    filter (eg. max number of iterations, max RMS error. etc).

The parameter setting is:
  curvesFilter->SetPropagationScaling( 1.0 );
  curvesFilter->SetCurvatureScaling( 0.1 );
  curvesFilter->SetAdvectionScaling( 0.5 );
  curvesFilter->SetMaximumRMSError( 0.03 );
  curvesFilter->SetNumberOfIterations( 500 );

>
> 4) The number of iterations that the filter actually used by
>    the time it stopped.

The program prints out following information when finish:
    No. elpased iterations: 446
    RMS change: 0.0298426

>
>
> Thanks
>
>
>     Luis
>
>
>
> ------------------
> Pingkun Yan wrote:
>
>> Hi Luis,
>>
>> Thank you for your reply. Actually, I applied the Sigmoid of the Gradient 
>> Magnitude on the "test.png" to get feature image. Then I used 
>> FastMarching to generate an initial circle as the test example.
>>
>> Thanks!
>>
>> Pingkun.
>>
>> ----- Original Message ----- From: "Luis Ibanez" 
>> <luis.ibanez at kitware.com>
>> To: "Pingkun" <pingkun at ieee.org>
>> Cc: <insight-users at itk.org>
>> Sent: Wednesday, September 29, 2004 11:22 PM
>> Subject: Re: [Insight-users] Results of itkCurvesLevelSetImageFilter
>>
>>
>>>
>>> Hi Pingkun,
>>>
>>> When you passed the image "test.png" as input to the LevelSet filter,
>>> did you pass it as the "InputImage" or as the "FeatureImage" ?
>>>
>>> The example that you mention is building its own Feature and Input
>>> image. In order to use this level set filter you must provide *both*
>>> an "Input" image, which is a level set initialization, and a "Feature"
>>> image, which is typically a speed image, like the one you can create
>>> with the Sigmoid of the Gradient Magnitude.
>>>
>>> Please let us know more details on how did you feed the inputs to
>>> the filter.
>>>
>>>
>>>   Thanks
>>>
>>>
>>>     Luis
>>>
>>>
>>> ----------------
>>> Pingkun wrote:
>>>
>>>> Dear all,
>>>>
>>>> I tried the itkCurvesLevelSetImageFilter on the attached image
>>>> "test.png" and the results is shown in "outputLevelSet.png". The 
>>>> results
>>>> look like two vessels with the true boundaries as their centerlines. I
>>>> just followed the test file "itkCurvesLevelSetImageFilterTest.cxx".
>>>> Anybody can point out the problem or give me an example? Thanks!
>>>>
>>>> Rgds,
>>>> Pingkun
>>>> ------------------------------------------------------------------------
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>>>> _______________________________________________
>>>> Insight-users mailing list
>>>> Insight-users at itk.org
>>>> http://www.itk.org/mailman/listinfo/insight-users
>>>
>>>
>>>
>>>
>>>
>>
>> _______________________________________________
>> Insight-users mailing list
>> Insight-users at itk.org
>> http://www.itk.org/mailman/listinfo/insight-users
>>
>>
>
>
>
> 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: edgePotential.png
Type: image/png
Size: 2355 bytes
Desc: not available
Url : http://public.kitware.com/pipermail/insight-users/attachments/20041001/4865c857/edgePotential.png
-------------- next part --------------
A non-text attachment was scrubbed...
Name: initialLevelSet.png
Type: image/png
Size: 241 bytes
Desc: not available
Url : http://public.kitware.com/pipermail/insight-users/attachments/20041001/4865c857/initialLevelSet.png