[Insight-users] Mattes Mutual Information implementation

[Tim Allman]

My apologies for not reading the documentation. :-[

However, the v4 version, 
JointHistogramMutualInformationImageToImageMetricv4, truly is 
undocumented. What is its thread safety?

Thanks,
Tim

On 13-03-12 05:33 PM, Christopher Mullins wrote:
> /"This class in not thread safe due the private data structures used 
> to the store the sampled points and the marginal and joint pdfs." [1]/
> /
> /
> /[1] 
> /http://www.itk.org/Doxygen314/html/classitk_1_1MattesMutualInformationImageToImageMetric.html
>
>
> On Tue, Mar 12, 2013 at 4:50 PM, Rick Frank <rfrank at dominionsw.com 
> <mailto:rfrank at dominionsw.com>> wrote:
>
>     What is the reason it is not thread safe?
>
>     Rick Frank
>
>     On Mar 12, 2013, at 2:10 PM, "Tim Allman" <dr.tim.allman at gmail.com
>     <mailto:dr.tim.allman at gmail.com>> wrote:
>
>>     I have been living with mutual information day and night for  a
>>     while. You can get more information about Normalised MI in D.
>>     Rueckert et al. IEEE Trans. Med. Imag., 18 712 (1999) and Mattes
>>     MI in Mattes et al IEEE Trans. Med. Imag., 22 120-128 (2003) and
>>     references contained therein.
>>
>>     If you understand the methods in the papers, the ITK classes
>>     start to make sense in spite of the poor documentation. It is
>>     undocumented but true that Mattes MI is not thread safe so you
>>     must set the number of threads it uses to 1. I don't know about
>>     the other.
>>
>>     Tim
>>
>>     On 13-03-12 01:26 PM, Pedro Morais wrote:
>>>     Good afternoon,
>>>
>>>     I'm working with Mattes Mutual Information to register a MRI
>>>     sequence.
>>>     Someone can send me some information about Mattes Mutual
>>>     Information implementation, there are a lot of parameters but I
>>>     think that the documentation is not enough.
>>>     I don't understand what is the difference between the Normalized
>>>     Mutual Information and Mattes Mutual Information. I need to
>>>     decide between the two methods, but I need to know the
>>>     advantagens of each technique.
>>>
>>>     Thanks for the help.
>>>     -- 
>>>     Kind Regards,
>>>
>>>     Pedro Morais
>>>
>>>
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>>
>>     -- 
>>     Tim Allman, Ph.D.
>>     35 Margaret Street,
>>     Guelph Ontario N1E 5R6
>>     Canada
>>     <dr_tim_allman.vcf>
>>     _____________________________________
>>     Powered by www.kitware.com <http://www.kitware.com>
>>
>>     Visit other Kitware open-source projects at
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>
>     _____________________________________
>     Powered by www.kitware.com <http://www.kitware.com>
>
>     Visit other Kitware open-source projects at
>     http://www.kitware.com/opensource/opensource.html
>
>     Kitware offers ITK Training Courses, for more information visit:
>     http://www.kitware.com/products/protraining.php
>
>     Please keep messages on-topic and check the ITK FAQ at:
>     http://www.itk.org/Wiki/ITK_FAQ
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>     Follow this link to subscribe/unsubscribe:
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>
>
>
> -- 
> Christopher Mullins
> R&D Engineer
> Kitware Inc.,
> 919.869.8871

-- 
Tim Allman, Ph.D.
35 Margaret Street,
Guelph Ontario N1E 5R6
Canada

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