[ITK-users] Mattes Mutual Information Metric - MultiThread

[Johnson, Hans J]

I believe this was fixed.

I created a new gerrit-patch to update the documentation:
http://review.source.kitware.com/#/c/15249/

The note about multi-threading not working was placed there in 2002, and
there was a lot of work done to address multithreading since that time.

Multithreading was fixed in 2011 in preparation for
using MI for BRAINSTools testing and for inclusion into
Slicer.  It was fixed in patch set
f542d0c75848ccb8bf35130a896da2fdb1a10d2c,
but the comment was overlooked.


Hans



On 4/23/14, 6:41 AM, "Ivan Setiawan" <ivans at yahoo.co.jp> wrote:

>Dear all,
>
>I have a question regarding multi-threading in
>itk::MattesMutualInformationImageToImageMetric.
>Currently I am using v4.4.0.
>
>The document below has a note that "2. This class in not thread safe due
>the private data structures used to the store the sampled points and the
>marginal and joint pdfs."
>http://www.itk.org/Doxygen44/html/classitk_1_1MattesMutualInformationImage
>ToImageMetric.html
>
>However, I have tried with SetNumberOfThreads(1) and
>SetNumberOfThreads(16) and found that both single- or multi-thread gave
>the same bit-exact result.
>Of course, the one with SetNumberOfThreads(16) processed much faster.
>
>So my question, is it OK to use
>itk::MattesMutualInformationImageToImageMetric with multi-thread even
>though the document says not to?
>
>Thank you and best regards,
>Ivan
>
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