[Insight-users] `Image Memory Management

[David Holmes]

--- Luis Ibanez <luis.ibanez@kitware.com> wrote:
> 
> Hi David,
> 
> Well, the fact that the Data is available only
> in the scope of the ImportImageContainer is actually
> an advantage since it will take care of memory
> release.
> 
> If what you want is to use this pixel data in
> another
> image, you may want to instantiate another image and
> use the SetPixelContainer() method like:
> 
>    newimage->SetPixelContainer(  pixelContainer );
> 
> The memory will be available as long as the
> pixelContainter SmartPointer or the newimage
> SmartPointer exist.
> 
> 
> The flag that controls memory release in the
> ImportImageContainer is :
> 
>    bool  m_ContainerManageMemory;
> 
> and it is set internally by the container.
> 
> We could consider adding a public Set() method to
> the
> class API so you could put set the flag to off, then
> let die the container and keep the memory...
> 
> This may probably make sense if you are exporting
> the
> data to another library where you don't whant to
> manage
> ITK objects anymore.
> 
> Is that the case ?
> 
> Please let us know,
> 
> 
>    Thanks
> 
> 
>     Luis
> 
> 
> =====================================
> 
> David Holmes wrote:
> 
> > Luis-
> > 
> > thank you for your quick response.  I was actually
> > looking into the ImportImageContainer when I
> received
> > your note.  I implemented your suggestions, but I
> > think that I still have a problem.  Now the data
> is
> > limited to the scope of the ImportImageContainer
> > Pointer.  Because I am simply grabbing the
> container
> > out of the Image, the flag that controls memory
> > management has already been set to TRUE
> (presumably by
> > the filter object), so the data will still be
> > destroyed outside the scope of the
> > ImportImageContainer Pointer.  As such, when I try
> and
> > access the array (by way of the pointer to the
> data
> > outside the function), it core dumps.  I've tried
> to
> > find a way to reset that flag, but haven't found
> it
> > yet.
> > 
> > does this make sense?
> > 
> > I don't know, but if you can help me, I'd
> appreciate
> > it.
> > 
> > Thanks
> > 
> > david
> > 
> > 
> > 
> 
> 


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