[Insight-users] Mattes Mutual Information implementation
Tim Allman
dr.tim.allman at gmail.com
Wed Mar 13 11:39:01 EDT 2013
Now I'm confused. What is the difference between the two?
The comment at the top of
itkJointHistogramMutualInformationImageToImageMetricv4.h indicates that
this is the Mattes et al method. However, the reference predates the
Mattes paper by three years. (By the way the class name is wrong in the
comment so it doesn't show up in the doxygen document. I have edited the
comment.)
/** \class JointHistogramMutualInformationImageToImageMetric
* \brief Computes the mutual information between two images to be
* registered using the method of Mattes et al.
*
* References:
* [1] "Optimization of Mutual Information for MultiResolution Image
* Registration"
* P. Thevenaz and M. Unser
* IEEE Transactions in Image Processing, 9(12) December 2000.
*
* \ingroup ITKMetricsv4
*/
So, does this class implement the referenced paper?
Is the v4 Mattes class thread safe?
Thanks,
Tim
On 13-03-13 10:10 AM, brian avants wrote:
> http://www.itk.org/Doxygen43/html/search.php?query=mattes
>
> gives you
>
> http://www.itk.org/Doxygen43/html/classitk_1_1MattesMutualInformationImageToImageMetricv4.html
>
>
> brian
>
>
>
>
> On Wed, Mar 13, 2013 at 9:37 AM, Tim Allman <dr.tim.allman at gmail.com
> <mailto:dr.tim.allman at gmail.com>> wrote:
>
> 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:
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>>
>>
>> --
>> Christopher Mullins
>> R&D Engineer
>> Kitware Inc.,
>> 919.869.8871 <tel:919.869.8871>
>
> --
> Tim Allman, Ph.D.
> 35 Margaret Street,
> Guelph Ontario N1E 5R6
> Canada
>
>
> _____________________________________
> 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
>
> Follow this link to subscribe/unsubscribe:
> http://www.itk.org/mailman/listinfo/insight-users
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>
--
Tim Allman, Ph.D.
35 Margaret Street,
Guelph Ontario N1E 5R6
Canada
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