[Insight-users] itkListSampleToHistogramFilter problem

[Benjamin King]

Hi Jisung,

thanks for the information about the design of ITK's statistics part. From 
my point of view it would be nice if the pipeline mechanism was expanded 
because it would match my intuition. But then again I'd lose a fine excuse 
for pervading my code with Update()s =)

Best regards,
  Benjamin

> Hi. Benjamin.
>
> The statistics part of ITK doesn't support ITK
> DataObject-ProcessOject pipeline mechanism. If there
> is a pipeline before any statistics classes, you have
> to call Update() method of the last componenent
> (usually a image filter). In your case, the cast
> filter is the last component.
>
> So, the problem you faced is by design. ITK developers
> are discussing about expanding the pipeline mechanism
> beyond current DataObject-ProcessObject domain. But it
> will take some time, I guess.
>
> Thanks,
>
> Jisung Kim
> --- Benjamin King <king . benjamin at mh-hannover . de>
> wrote:
>> Hello all,
>>
>> the attached program uses a
>> itk::ListSampleToHistogramFilter to compute a histogram of a volume. I 
>> commented out a line that
>> Update()s a filter that imho should be updated by the
>> ListSampleToHistogramFilter.
>> Removing the comment yields the desired result, but
>> I think this is not how it's supposed to be done.
>> Maybe it's a problem with the ImageToListAdaptor,
>> but I'm not sure about that.
>>
>> Any comments on this are welcome,
>>
>> Best regards,
>> Benjamin
>>
>>
> =====
> Jisung Kim
> bahrahm at yahoo . com
> 106 Mason Farm Rd.
> 129 Radiology Research Lab., CB# 7515
> Univ. of North Carolina at Chapel Hill
> Chapel Hill, NC 27599-7515
>

-- 
Benjamin King
Institut für Medizinische Informatik
Medizinische Hochschule Hannover
Tel.: +49  511  532-2663