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>