[Insight-users] progressSlider & ProgressEvent & IterationEvent

[Luis Ibanez]

Hi Zein,

The problem is that not all filters invoke ProgressEvent()'s.

Some of the filters work on iterative basis and it is not
possible to establish in advance how long it will take
them to run. Those iterative filters throw IterationEvents().

You can observe iteration events and increment a counter
in your GUI.  Examples of this can be seen in :

    Insight/Examples/FastMarchingLevelSet
    Insight/Examples/ShapeDetectionLevelSet


For example, Connected components filters work with a
stack of pixels to be visited. Pixels are added to and
removed from the stack. The filter is done when the
stack is empty, but it is not possible to anticipate
how long it will take to process the pixels on the image.


Other filters are simply missing the functionality and
should be added to the  TODO list.    :-/

That's the case of the RecursiveGaussian filter for
example.

Thanks for pointing this out,


    Luis


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Zein Salah wrote:

> Hello all,
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> I have added a progressSlider to my user interface to monitor the=20
> progress of some filters. It has woked good for some filters like:
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>    GrayscaleFunctionErodeImageFilter  and   RecursiveGaussianImageFilte=
r.
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> It has not respond to the segmentation filters like:
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> SimpleFuzzyConnectednessScalarImageFilter ,=20
> ConnectedThresholdImageFilter, and ConfidenceConnectedImageFilter
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> Although I have defined all of the the same way.
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>    InputErotionFilterType::Pointer                         m_Eroder;=20
>    RecursiveGaussianImageFilterType::Pointer               m_Smoother;
>    ConfidenceConnectedImageFilterType::Pointer             m_CCSeg;
>    ConnectedThresholdImageFilterType::Pointer              m_CTSeg;
>    SimpleFuzzyConnectednessScalarImageFilterType::Pointer  m_FuzSeg;
> ...
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> ...
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> ...
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> ...
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>   progressSlider->Observe( m_Eroder.GetPointer() );
>   progressSlider->Observe( m_Smoother.GetPointer() );
>   progressSlider->Observe( m_CTSeg.GetPointer() );
>   progressSlider->Observe( m_CCSeg.GetPointer() );
>   progressSlider->Observe( m_FuzSeg.GetPointer() );
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> It did not respond  to the file Reader.=20
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> Do anybody have an idea what could the problem be???
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> many thanks,
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> Zein
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> ->8<------------->8<------------->8<------------->8<------------->8<---=
---------->8<-
> Zein I. Salah
> Universit=E4t T=FCbingen, WSI-GRIS
> Sand 14
> 72076 T=FCbingen
> Email: salah@gris.uni-tuebingen.de <mailto:salah@gris.uni-tuebingen.de>=
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> / zeinsalah@hotmail.com <mailto:zeinsalah@hotmail.com>
> Tel.: (07071) 29 75465 (GRIS) , (07071) 96 44 39 (privat)
> Fax: (07071) 29 54 66
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