[Insight-users] Re: memory saving

[Tim Rudge]

Thanks Luis, I have tried release mode and it is much quicker... but i 
think i still need to get it quicker as my data is ~500^3. Plus i have 
memory problems. I think this is because I set up the pipeline and then run 
the whole thing - so is each filter producing a seperate image as a 
result?, i.e. 
input[Image]->smoothing->[Image]->Gaussderivative->[Image]->sigmoid->[Image
]->fastmarching->[Image]->Levelsets->[Image]. Thats 6 images of the same 
size as the input, right? So is it ok to do each stage seperately deleting 
results when they are not needed?

Tim

--On 16 June 2003 11:49 -0400 Luis Ibanez <luis . ibanez at kitware . com> wrote:

>
> Hi Tim,
>
> All ITK filters will be much quicker in Release mode.
>
> When you compile for Debug mode, the code that is
> intended to be inlined is just compiled as regular
> functions. Debug mode, doesn't take advantage of
> all what templates are supposed to contribute in
> run-time performance.
>
> Filters like the MedianImageFilter in a 5x5x5
> neighborhood will run 10 to 15 times faster when
> compiled for Release.
>
> So, yeap: Please rebuild your application for Release,
> that should make a huge difference.
>
> Note that you must recompile ITK itself for release,
> as well as any other third party library you may be
> using in your applications. (e.g. VTK, FLTK...).
> Mixing compilation modes will result in link problems
> and run-time instability.
>
> If after compiling for release you still find the
> execution time to be too long, there are a couple
> of things that can be done for improving performance.
> For example doing multiresolution in the level set,
> and improving the initializatoin.
>
> Please let us know what you find
>
>
> Regards,
>
>
>     Luis
>
>
> -----------------
> Tim Rudge wrote:
>> Hi,
>>
>> Im using itkShapeDetectionLevelSetFilter and it seems to be v. slow in
>> debug mode (to the point where im having to resample from 500^3 to 50^3
>> to get reasonable comp. times of 1-2 mins for the whole pipeline). Will
>> this be much quicker in release mode or am i doing s/thing wrong? This
>> is on a dual 600MHz 2Gb winXP m/c.
>>
>> Tim
>>
>> Tim Rudge
>> ---------
>> Cellular Development Lab
>> Dept. Plant Sciences
>> Cambridge University
>> _______________________________________________
>> Insight-users mailing list
>> Insight-users at www . itk . org
>> http://www . itk . org/mailman/listinfo/insight-users
>>
>
>
>



Tim Rudge
---------
Cellular Development Lab
Dept. Plant Sciences
Cambridge University