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<DIV><SPAN>Hi Chester,</SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN>Look for 'this->f_->Compute' in vnl_lbfgsb.cxx file. This code invokes metric value and gradient computation. <VAR id=yiv1963267862yui-ie-cursor></VAR></SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN>Regards</SPAN></DIV>
<DIV><SPAN>Yogish </SPAN></DIV>
<DIV><BR></DIV>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> 黄成 <huangcheng1987928@gmail.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> insight-users <insight-users@itk.org> <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, 16 February 2012 1:33 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Insight-users] Why does LBFGSBOptimizer never invoke the metric components<BR></FONT></DIV><BR>
<DIV id=yiv76630846>Hi ITK users,
<DIV><BR></DIV>
<DIV> There is a question which bothers me for a long time. Why does LBFGSBOptimizer never invoke the metric components? For an example, in a registration method, I set a metric component("itkMattesMutualInformationImageToImageMetric", for an example) and set the LBFGSBOptimizer as the optimizer. Then no matter where I insert the break point in the metric, once the registration process starts, it will never stop until the optimization process finishes. It looks like the optimizer process never invoke any method in the metric component. Shouldn't the optimizer should put the value of metric into consideration at each step?</DIV>
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<DIV><BR></DIV>-- <BR>
<DIV>黄成</DIV>
<DIV>Chester Huang </DIV>
<DIV>中國科學院研究生院深圳先進技術研究院</DIV>
<DIV>Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences</DIV>
<DIV><BR></DIV>
<DIV>Mobile: 13392858763</DIV>
<DIV>E-mail: <A href="mailto:cheng.huang@siat.ac.cn" rel=nofollow target=_blank ymailto="mailto:cheng.huang@siat.ac.cn">cheng.huang@siat.ac.cn</A></DIV>
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