Re: [ITK-users] Problem with SliceBySliceImageFilter, only applied on the first slice

Thank Brad,

Following your suggestion to move the creation of the invidual filters to
the GenerateData method, it works. I assume I will understand why once, I
get more experience with ITK.


Best,
Jonas


On Wed, Aug 2, 2017 at 7:38 PM, Lowekamp, Bradley (NIH/NLM/LHC) [C] <
blowekamp-2loH/[email protected]> wrote:

> Hello,
>
>
>
> Does using the that example filter cause the problem?
>
>
>
> There are many subtle problems that a composite filter implementation can
> have. These include not properly grafting the input or output in the
> GenerateData method. Also issues with the incorrect modified times not
> being modified or being modified too often are common. The example
> illustrates having the mini-pipeline filter of the composite filter as
> member variables. This can make things more problematic when executing a
> filter multiple times. I prefer to create the individual filters in the
> GenerateData method, as it generally  has been more reliable, and may side
> step some issues related to the modified times.
>
>
>
> The ways to debug a complex pipeline include: interactively using a debug
> to set up break points, add a number of Event call backs to monitor the
> execution of different filters and using the PipelineMonitorImageFilter to
> record the steps in a pipeline execution.
>
>
>
> Your first steps may be to determine if the composite filter is being
> executed for each slice, and if it is being executed then is the internal
> mini-pipeline being executed or do the modified time indicate it is up to
> date?.
>
>
>
> HTH,
>
> Brad
>
>
>
>
>
> *From: *Jonas Teuwen <[email protected]>
> *Date: *Wednesday, August 2, 2017 at 12:51 PM
> *To: *"[email protected]" <[email protected]>
> *Subject: *[ITK-users] Problem with SliceBySliceImageFilter, only applied
> on the first slice
>
>
>
> Hi all,
>
>
>
> Using the SliceBySliceImageFilter as in the Insight Journal
> http://www.insight-journal.org/browse/publication/133 works.
>
>
>
> However, when I build a pipeline such as https://itk.org/Doxygen46/
> html/Filtering_2CompositeFilterExample_8cxx-example.html and plug that in
> the above example, the output has the right size, but the output is the
> filter applied to the first slice and copied to all the others.
>
>
>
> What would be the appropriate way to debug this?
>
>
>
> Best,
>
> Jonas
>

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