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ID | Project | Category | View Status | Date Submitted | Last Update | ||||||||
0003606 | ITK | public | 2006-08-14 08:45 | 2010-11-06 23:43 | |||||||||
Reporter | Luis Ibanez | ||||||||||||
Assigned To | brian avants | ||||||||||||
Priority | urgent | Severity | minor | Reproducibility | always | ||||||||
Status | assigned | Resolution | open | ||||||||||
Platform | OS | OS Version | |||||||||||
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Target Version | Fixed in Version | ||||||||||||
Summary | 0003606: RegularStepGradientDescentOptimizer reports current position out of sync in iteration event | ||||||||||||
Description | In the RegularStepGradientDescentBaseOptimizer the IterationEvent is invoked at a moment where the current position has already been computed for the next iteration. This results in mismatch between the "current position" and the "m_Value" reported. Lines 263 and 267 should be reverted. | ||||||||||||
Tags | No tags attached. | ||||||||||||
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Notes | |
(0004638) Luis Ibanez (manager) 2006-08-14 08:46 |
We should check whether a similar problem happens in other optimizers. |
(0004639) Luis Ibanez (manager) 2006-08-14 08:48 |
There is also an issue with not keeping the position of the actual lowest value: http://public.kitware.com/pipermail/insight-users/2006-August/019041.html [^] |
(0022935) Luis Ibanez (manager) 2010-11-06 23:43 |
This still seems to be the case. itkRegularStepGradientDescentBaseOptimizer.cxx: 266 this->InvokeEvent( IterationEvent() ); at the end of the AdvanceOneStep() method. which means that the Current position is the new one, but the cached value is the one of the previous position. |
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Issue History | |||
Date Modified | Username | Field | Change |
2010-11-05 00:26 | Cory W Quammen | Relationship added | related to 0003205 |
2010-11-06 23:39 | Luis Ibanez | Assigned To | Luis Ibanez => brian avants |
2010-11-06 23:43 | Luis Ibanez | Note Added: 0022935 |
Issue History |
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