[Insight-users] how to reduce the run time of ITK

[Luis Ibanez]

Hi Yixun,

Thanks for posting the additional information about
the deformable registration that you are performing.


1) 40 minutes for a 3D deformable registration is
    not unusual


2) Debug version is a bad choice. Please recompile
    your code for Release. That will reduce the
    computation time. Note that in Windows, you will
    have to first recompile ITK for Release, and then
    recompile your own application for release.


3) BSplines performance may be improved in the
    future, (some months from now) new classes must
    be added to the toolkit in order to implement a
    faster evaluation of BSplines.



   Regards,


      Luis



------------------------
Yixun Liu wrote:

> Hi,
>  1) The operating system is winXP and compiler is VC++6.0
> 2)  I use the non-rigid registration. The metric is MattesMI and the transform is Cubic BSpline
> 3) The size of the two images is: 256*256*46, spacing is 0.859*0.859*3
> 4) the control grid is: 15*15*6 (include the control points outside the image)
> 4)need about 40 minutes to finish
> 5) the debug version
> 7)hardware profile: intel IIII 2.6G CPU, 1.5G Memory.
> 6) optimizer parameters are 
> 
>>  optimizer->SetGradientConvergenceTolerance( 0.05 );
>>  optimizer->SetLineSearchAccuracy( 0.9 );
>>  optimizer->SetDefaultStepLength( 1.5 );
>>  optimizer->SetMaximumNumberOfFunctionEvaluations( 1000 );
> 
> 
> Thanks!
> 
> 
> ----- Original Message ----- 
> From: "Luis Ibanez" <luis.ibanez at kitware.com>
> To: "Yixun Liu" <yxliu at fudan.edu.cn>
> Cc: <insight-users at itk.org>
> Sent: Monday, December 27, 2004 9:58 PM
> Subject: Re: [Insight-users] how to reduce the run time of ITK
> 
> 
> 
>>Hi Yixun,
>>
>>
>>We will need you to provide the following information,
>>in order to be able to give you any useful advice:
>>
>> 1) What operating system and compiler are you using ?
>> 2) What specific registration algorithm did you used ?
>> 3) What time did it take you to register the images ?
>> 4) What is the size (in pixels) of your images ?
>>
>>
>>The first thing that you should try in general is to select
>>
>>
>>          CMAKE_BUILT_TYPE = Release
>>
>>
>>both when you configure ITK and when you configure your
>>application.
>>
>>
>>Please let us know about the registration method that you
>>used, since the options for speeding up are method-dependent.
>>
>>
>>  Thanks
>>
>>
>>     Luis
>>
>>
>>
>>-----------------
>>Yixun Liu wrote:
>>
>>
>>
>>>Hi,
>>> 
>>>I use the ITK to registe two 3D images. The registed result is fine, but 
>>>the run time it too long. The registration parameters are finely 
>>>adjusted. Does ITK support parallel computation? Please give me some 
>>>suggestion about how to reduce the run time.
>>> 
>>>Regards,
>>> 
>>>Yixun Liu
>>>
>>>
>>>------------------------------------------------------------------------
>>>
>>>_______________________________________________
>>>Insight-users mailing list
>>>Insight-users at itk.org
>>>http://www.itk.org/mailman/listinfo/insight-users
>>
>>
>>
>>
> 
>