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List:       insight-users
Subject:    [Insight-users] why does CorrelationCoefficient metric run so slowly?
From:       Wenwu <cool.wenwu () gmail ! com>
Date:       2013-02-26 17:36:11
Message-ID: CAKAntpsyW9E-73q=LVZ4rH+rmVoHP=0rsa7JyeXgU=ici4xUPQ () mail ! gmail ! com
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Dear all,

Now I try to use coorelation coefficient
(itk::CorrelationCoefficientHistogramImageToImageMetric) as a simularity
metric in non rigid registration. The image size is: 510*416*81.
The program is compiled in 64 bits and release mode. So I think the program
should run fast.  But in fact, it cost more than one hour for only 100
iterations in rigid registration part.
The optimizer I adopt is itkRegularStepGradientDescentOptimizer.
For the same registration framework, I use the Mattes MI metric to test,
the program runs very fast.

So could anyone give some kind suggestion?

Thank you very much!

-- 
Wenwu Zhu
IRCAD
University of Strasbourg, France
Email address: cool.wenwu@gmail.com

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Dear all,<br><br>Now I try to use coorelation coefficient \
(itk::CorrelationCoefficientHistogramImageToImageMetric) as a simularity metric in \
non rigid registration. The image size is: 510*416*81. <br>The program is compiled in \
64 bits and release mode. So I think the program should run fast.  But in fact, it \
cost more than one hour for only 100 iterations in rigid registration part.<br>

The optimizer I adopt is itkRegularStepGradientDescentOptimizer.<br>For the same \
registration framework, I use the Mattes MI metric to test, the program runs very \
fast.<br><br>So could anyone give some kind suggestion?<br>

<br>Thank you very much! <br clear="all"><br>-- <br><div>Wenwu Zhu</div>
<div>IRCAD<br>University of Strasbourg, France<br>Email address: <a \
href="mailto:cool.wenwu@gmail.com" target="_blank">cool.wenwu@gmail.com</a></div>



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