AW: [Insight-users] Process Bar problem in ITK program

[Luis Ibanez]

Hi Jiang,

Could you please do the following simple test :

Replace the FuzzyConnectedness filter with any
other filter. For example the itkMedianImageFilter
and run the application again to see if the progress
bar in the GUI advances or not.

This will help to identify if the problem is related
to your GUI code or to the pace at which the Fuzzy
Connectedness filter is reporting its progress.

Please let us know what you find.


Thanks


   Luis



------------------------
jiang wrote:

> Hi Luis,
> Thank you very much for your detailed answer. I read the documents as your
> hints, and integrate the QtITK's QtProcessBar into my code. However, when I
> run application, the progress bar doesn't work. The progress bar's frame is
> showed on the screen as I set in the program. But the progress bar doesn't
> go ahead even the whole application is over.
> The following is my code:
> 
> 
> 
> void initializeProgressBar()
> {
> 
> 		FilterPointer  m_Filter;
> 		m_Filter=lg->GetFCFilter();//to get FuzzyConnectedness pointer. At this
> time, the pointer is just constructed, without any operations.
>   // Connect the progress bar to the ITK processObject
>   qs->Observe( m_Filter.GetPointer() );
> 
>   typedef itk::QtSlotAdaptor<FilterType> SlotAdaptorType;
>   SlotAdaptorType slotAdaptor;
> 
>   // Connect the adaptor to a method of the ITK filter
>   slotAdaptor.SetCallbackFunction( m_Filter, & FilterType::Update );
> 
>   // Connect the adaptor's Slot to the Qt Widget Signal
>   connect( FuzzyConBt, SIGNAL(clicked()), &slotAdaptor, SLOT(Slot()) );
> 
> lg->FCSegmentation();//Perform the FuzzyConnectedness segmentation
> 
> }
> 
> Call initializeProgressBar() when use clicks the command button.
> 
> 
> Is there something wrong in my code? Why progress bar doesn't run?
> 
> With best regards,
> 
> Chunyan
> 
> -----Ursprungliche Nachricht-----
> Von: Luis Ibanez [mailto:luis . ibanez at kitware . com]
> Gesendet: Mittwoch, 3. Dezember 2003 01:33
> An: jiang
> Cc: ITK
> Betreff: Re: [Insight-users] Process Bar problem in ITK program
> 
> 
> Hi Chunyan,
> 
> ITK filters use the paradigm of Event/Observers
> You will find a description of this concepts in
> the software guide
> 
>     http://www . itk . org/ItkSoftwareGuide . pdf
> 
> please look at Chapter 3, "System Overview"
> pdf-page 45.
> 
> Examples on the use of Observers are abundant on
> the Registration chapter.
> 
> You will also find descriptions on how to use
> observers in the tutorial sessions:
> 
> In particular in "ITK Architecture" :
> http://www . itk . org/CourseWare/Training/GettingStarted-III . pdf
> 
> 
> For code examples on how to integrate ITK with Qt,
> please look at the tutorial:
> 
>         "ITK and Graphical User Interface"
> http://www . itk . org/CourseWare/Training/GettingStarted-IV . pdf
> 
> 
> You will find code examples about interfacing Qt and ITK in
> 
> 
>       InsightApplications/QtITK
> 
> 
> There is an explicit example on how to create a QtProgress
> bar that is connected as observer of the ProgressEvents
> sent by an ITK filter.
> 
> Look at:
> 
>      itkQtProgressBar.h
>      itkQtProgressBar.cxx
> 
> http://www . itk . org/cgi-bin/cvsweb . cgi/InsightApplications/QtITK/?cvsroot=Ins
> ight
> 
> 
> 
> 
> Regards,
> 
> 
>     Luis
> 
> 
> 
> --------------------------------------
> jiang wrote:
> 
> 
>>Hi,
>>I can use FuzzyConnectedness to do segmentation in my program. However,
> 
> the
> 
>>segmenting process is a time consuming work. I want to use process bar to
>>indicate the progress. When I debug the code, I find that there is only
> 
> one
> 
>>line is very slow. It is m_Filter->Update(); This step occupies almost 80%
>>process time.
>>How can I separate m_Filter->Update(); in several steps, or use other
> 
> method
> 
>>to show the process of the segmentation?
>>I use Qt as GUI.
>>
>>Thanks a lot!
>>
>>Chunyan
>>
>>_______________________________________________
>>Insight-users mailing list
>>Insight-users at itk . org
>>http://www . itk . org/mailman/listinfo/insight-users
>>
> 
> 
> 
> 
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