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<font size="-1">Hello to all,<br>
<br>
<font size="-1">I'<font size="-1">m using the itk::LBFGSBOptimizer
class. It rel<font size="-1">ies on the vnl_lbfgsb class,
which in turn </font>makes <font size="-1">use of</font>
the L-BFGS-B routines from netlib
(Modules\ThirdParty\VNL\src\vxl\v3p\netlib\opt\lbfgsb.c)<font
size="-1">.<br>
</font></font>The L-BFGS-B routines were thread-safe by ITK
3.20 (<a class="moz-txt-link-freetext"
href="http://www.itk.org/Bug/print_bug_page.php?bug_id=3548">http://www.itk.org/Bug/print_bug_page.php?bug_id=3548</a>).<font
size="-1"><font size="-1"> They were</font> then improved as
described in Jorge Nocedal and Jose Luis Morales (2011)<font
size="-1">;</font> if I'<font size="-1">m not mistaken th<font
size="-1">e non thread-safety was also reintroduced in th<font
size="-1">is</font> updated version of the code (in
lbfgsb.c).<br>
<br>
<font size="-1">Am I accurate in s<font size="-1">aying</font>
that <font size="-1">the L-BFGS-B optimizer is still
not thread-safe as of<font size="-1"><font size="-1">
ITK 4.3<font size="-1">? And if so, would somebody
have a working, <font size="-1">thread-safe
version of this piece of code? I'<font
size="-1">ve given it a try myself (cf.
attach<font size="-1">ment</font>), I'<font
size="-1">m just not quite 100% sure that
it'<font size="-1">s working as intended.<br>
<br>
<font size="-1">Thank<font size="-1">
you very much.<br>
<font size="-1">With best regards,<br>
<br>
<font size="-1">Loïc</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font>
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