[Insight-users] Memory prblem: failed to allocate memory

[Lars Nygard]

Hi luis,

The images Im trying to register are one MRT1-image which I use as fixed.
Spacing = 1.0 1.0 1.0; DimSize = 512 512 245; ElementType = MET_USHORT)
The other image is a MRA-image
(Spacing = 0.41 0.41 0.59; DimSize = 256 256 180; ElementType = MET_USHORT)

Im using a computer at my workplace (sintef norway) and it has a 2.26 GHz processor
and 1.99 GB of RAM. 

I did some experiments and found out that MutualInformation works fine but normalizedCorrelation,
patternIntensity and meanSquares all give the aforementioned error. When I change the meta
information for the MRA image DimSize to 400 400 200, all metrics worked but are Really slow.
PatternIntensity seems to be the slowest of all three (normalizedCorr, PaternInt and MeanSquare)

Im puzzled that three metrics give the same error and behave similar when I decrease the
Dimsize.
If you want I can send you the program. It's not very big.
regards,
Lars Nygard

----- Original Message ----
From: Luis Ibanez <luis.ibanez at kitware.com>
To: Lars Nygard <lnygard at yahoo.com>
Cc: insight-users at itk.org
Sent: Tuesday, June 12, 2007 5:31:56 AM
Subject: Re: [Insight-users] Memory prblem: failed to allocate memory


Hi Lars,


A couple of basic questions:


1) How big are your images ?

    How many pixels along every direction ?
    (for both the Fixed and Moving images)


2) How much RAM do you have in your computer ?


Please let us know,


   Thanks


      Luis



-----------------------
Lars Nygard wrote:
> Hi All,
> 
> Im working on a 3D registration program for MRI images. Ive asked this question a while
> ago but IM still strugling with this. My program works fine when I use versor3Drigid transform
> with MattesMutualInformation, but when I change the metric to either meansquare, normalized
> Correlation or Pattern Intensity, I get the same error (see below). It's located in the
> imageImportContainer. Are there combinations of optimizer, transformation and metric that dont
> work together? or that are better avoided.
> Is there a way I can split up the process in the metric. For example first
> compute a gradient image and then supply it to the metric? Any idea is welcome.
> regards,
> Lars Nygard
> error
> -------------------------------------------------------------------------------------------------------------
> itk::ExceptionObject (0133FAD8)
> Location: "class itk::CovariantVector<double,3> *__thiscall itk::ImportImageCont
> ainer<unsigned long,class itk::CovariantVector<double,3> >::AllocateElements(uns
> igned long) const"
> File: c:\documents and settings\lars\desktop\insight toolkit\source\insighttoolk
> it-3.2.0\code\common\itkImportImageContainer.txx
> Line: 188
> Description: Failed to allocate memory for image.
> ---------------------------------------------------------------------------------------------------------------------------
> 
> 
>


      
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