[Insight-users] Runtime memory error in Fast marching Segmentation

[Luis Ibanez]

Hi Shaohua,


A 3D image with only 3 slices will not do the trick.
Such an image is cheerfully called "Degenerate"      :-)


One of the operations in this applications involve the
computaton of the gradient magnitude using recursive
gaussian filters.  These filters require at least
5 slices a long each dimension for performing the computations
of the IIR filter.


Please use one of the real 3D images available in the
FTP site.  Any of the BrainWeb images will be a good
choice.


   ftp://public . kitware . com/pub/itk/Data/BrainWeb

Those have sizes of 181 x 217 x 181  pixels.


Regards,


    Luis


--------------------
Shaohua Fan wrote:
> Hi Luis,
> 
> Thanks for anwsering my question. 
> 
> After I got your email, I ran the program
> FastMarchingLevelSet with a 3D image
> Examples/Data/BrainProtonDensity3Slices.mha,
> unfortunately still got the same error message. Any
> clue what other may cause that? Anything related to
> compiling the applications with vtk option? Currently
> I set USE_FLTK on but UST_VTK off.
> 
> Thanks,
> 
> Shaohua
> 
> 
> 
>>Date: Fri, 26 Sep 2003 14:14:37 -0400
>>From: Luis Ibanez <luis . ibanez at kitware . com>
>>To: Shaohua Fan <sfan53704 at yahoo . com>
>>Cc: insight-users at itk . org
>>Subject: Re: [Insight-users] Runtime memory error in
>>Fast marching Segmentation
>> level set program
>>
>>
>>Hi Shaohua,
>>
>>
>>It looks like you are loading 2D images.
>>
>>These demo applications
>>
>>  - FastMarchingLevelSet
>>  - ShapeDetectionLevelSet
>>  - GeodesicActiveContour
>>
>>are intended to be used with 3D data.
>>
>>
>>ITK is N-Dimensional, but the applications are not.
>>
>>
>>
>>If you want to apply these segmentation methods
>>to 2D image, you can easily use the examples
>>available in Insight/Examples/Segmentation which
>>are command line tools.
>>
>>You will find detailed information about these
>>examples in the SoftwareGuide
>>
>>   http://www . itk . org/ItkSoftwareGuide . pdf
>>
>>in Section 9.3, pdf-page 363.
>>
>>---
>>
>>Note that most of the applications in
>>InsightApplications
>>are just "demos". They are not bullet-proof and are
>>not
>>intended to be used for clinical work. Their aim is
>>to
>>illustrate how you could use ITK in your own
>>applications.
>>
>>
>>
>>Regards,
>>
>>
>>    Luis
>>
>>
>>-------------------
>>Shaohua Fan wrote:
>>
>>>Hello,
>>>
>>>There is no problem to get the interface anc
>>
>>display
>>
>>>the input image(.png format, or .mha). However,
>>
>>when I
>>
>>>give some initial seed points and click "gradient
>>>magnitude" button, the program hang on there for a
>>>while and then
>>>gives an error message "The memory could not be
>>
>>read
>>
>>>". 
>>>Also, when I try to load and display several
>>
>>images
>>
>>>sequentially without restarting the program, it
>>>crashes.
>>>
>>>The same error occured when I tried
>>>shapeDectionLevelSet and geodesic active contour.
>>
>>Did
>>
>>>I do something wrong using those program -- those
>>>executives files come after I compliled
>>>InsightApplication? or some other reasons cause
>>
>>those
>>
>>>problems? Thanks a lot for helps. 
>>>
>>>Shaohua
>>>
>>
> 
> 
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