[Insight-users] LBFGSB with Mattes MI

[Johnson, Hans J]

I am working on this exact problem in for ITKv4. It has been an
outstanding issue for many years, and has been very nasty and difficult to
work out.  There is a issue related to this that will soon have greater
detail of what was actually wrong and how it was addressed:

I am hopeful that a solution will be ready for review by the middle of
today (I've been working on it for several weeks now).

The issue is being tracked at: https://issues.itk.org/jira/browse/ITK-2836


Hans

On 12/2/11 10:53 AM, "Severino Fernandez" <fdezas at gmail.com> wrote:

>I have to register two remote sensing images from different sensors.
>I use OTB for it, and sometimes the registration is successful with
>Mattes MI as metric and 1+1 evolutionary optimizer.
>I wanted to try with LBFGSB, as it seems to be very popular, and
>somewhere I even read that it would work OK for a "noisy" metric, like
>MI.
>The deformation I use is a simple translation (applied to small
>windows, 200x200).
>But LBFGSB, after fast convergence, gives very slow translation values
>as optimized parameters (for instance less tna 1 pixel, when the
>displacement is in the order of 20). I have set very different values
>for LBFGSB parameters, but the result does not practically change.
>I start basically from the same parameters as in DeformableRegistration12.
>Is any other setting to be considered? In fact, the optimization seems
>practically not to move from the starting value (0,0), as if each
>optimization step were extremely small.
>I appreciate any recomendation.
>Severino
>_____________________________________
>Powered by www.kitware.com
>
>Visit other Kitware open-source projects at
>http://www.kitware.com/opensource/opensource.html
>
>Kitware offers ITK Training Courses, for more information visit:
>http://www.kitware.com/products/protraining.html
>
>Please keep messages on-topic and check the ITK FAQ at:
>http://www.itk.org/Wiki/ITK_FAQ
>
>Follow this link to subscribe/unsubscribe:
>http://www.itk.org/mailman/listinfo/insight-users



________________________________
Notice: This UI Health Care e-mail (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. 2510-2521, is confidential and may be legally privileged.  If you are not the intended recipient, you are hereby notified that any retention, dissemination, distribution, or copying of this communication is strictly prohibited.  Please reply to the sender that you have received the message in error, then delete it.  Thank you.
________________________________