[Insight-users] Why does LBFGSBOptimizer never invoke the metric components

[Yogish Mallya]

Hi Chester,
 
Look for 'this->f_->Compute'  in vnl_lbfgsb.cxx file. This code invokes metric value and gradient computation. 
 
Regards
Yogish  




________________________________
From: 黄成 <huangcheng1987928 at gmail.com>
To: insight-users <insight-users at itk.org> 
Sent: Thursday, 16 February 2012 1:33 PM
Subject: [Insight-users] Why does LBFGSBOptimizer never invoke the metric components


Hi ITK users, 

          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?

-- 

黄成
Chester Huang 
中國科學院研究生院深圳先進技術研究院
Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences

Mobile:   13392858763
E-mail:   cheng.huang at siat.ac.cn

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