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My apologies for not reading the documentation. <span
class="moz-smiley-s6"><span> :-[ </span></span><br>
<br>
However, the v4 version,
JointHistogramMutualInformationImageToImageMetricv4, truly is
undocumented. What is its thread safety?<br>
<br>
Thanks,<br>
Tim<br>
<br>
<div class="moz-cite-prefix">On 13-03-12 05:33 PM, Christopher
Mullins wrote:<br>
</div>
<blockquote
cite="mid:CABVTP-JLpuJeUVj7wrb650m+nw_Aro3pw2twfoe=NdkQ-z_fcw@mail.gmail.com"
type="cite">
<div dir="ltr"><span
style="color:rgb(0,0,0);font-family:Geneva,Arial,Helvetica,sans-serif;font-size:14px"><i>"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]</i></span><br>
<div><span
style="color:rgb(0,0,0);font-family:Geneva,Arial,Helvetica,sans-serif;font-size:14px"><i><br>
</i></span></div>
<div><span
style="color:rgb(0,0,0);font-family:Geneva,Arial,Helvetica,sans-serif;font-size:14px"><i>[1] </i></span><a
moz-do-not-send="true"
href="http://www.itk.org/Doxygen314/html/classitk_1_1MattesMutualInformationImageToImageMetric.html">http://www.itk.org/Doxygen314/html/classitk_1_1MattesMutualInformationImageToImageMetric.html</a></div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Tue, Mar 12, 2013 at 4:50 PM, Rick
Frank <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:rfrank@dominionsw.com" target="_blank">rfrank@dominionsw.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div>What is the reason it is not thread safe?<br>
<br>
Rick Frank</div>
<div>
<div class="h5">
<div><br>
On Mar 12, 2013, at 2:10 PM, "Tim Allman" <<a
moz-do-not-send="true"
href="mailto:dr.tim.allman@gmail.com"
target="_blank">dr.tim.allman@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div> 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.<br>
<br>
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.<br>
<br>
Tim<br>
<br>
<div>On 13-03-12 01:26 PM, Pedro Morais wrote:<br>
</div>
<blockquote type="cite">Good afternoon,
<div><br>
</div>
<div>I'm working with Mattes Mutual Information
to register a MRI sequence.</div>
<div>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.</div>
<div>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.</div>
<div><br>
</div>
<div>Thanks for the help.</div>
<div>
<div>-- </div>
<div>Kind Regards,</div>
<div><br>
</div>
Pedro Morais </div>
<br>
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<br>
<pre cols="72">--
Tim Allman, Ph.D.
35 Margaret Street,
Guelph Ontario N1E 5R6
Canada
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<div><dr_tim_allman.vcf></div>
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-- <br>
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<div>R&D Engineer</div>
<div>Kitware Inc.,</div>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Tim Allman, Ph.D.
35 Margaret Street,
Guelph Ontario N1E 5R6
Canada
</pre>
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