[Insight-users] add and remove subimages

[David Pastor]

Hi Luis,

It would be at the end or at the beginning. In this case I just pretend to 
insert and remove images without arithmetic operations.

And certainly the image size should be updated after the removal or the 
insertion (no substitutions or holes are expected either).

So basically I need insertion and deletion of N-1 D images into/from N D 
images and adjust the origin and size of the resulting N D image (end and 
beginning)

I imagine than deletion can be achieved by selecting an interest region and 
then adjust the origin.
Insertion might be more tricky.

It would be nice to have some general insertion/deletion/replacement methods 
though.

Another issue would be if we can work with negative index positions. The 
point is that I need markers to be placed outside the LargestPossibleRegion, 
so i have to make the image size grow without affecting the content more 
than a shift in the growing dimension in respect of the new origin.

I hope this is clearer now.

thanks
david

----- Original Message ----- 
From: "Luis Ibanez" <luis.ibanez at kitware.com>
To: "David Pastor" <david.pastor at die.upm.es>
Cc: <insight-users at itk.org>
Sent: Wednesday, December 02, 2009 1:28 AM
Subject: Re: [Insight-users] add and remove subimages


Hi David,

By "Add" do you mean to "insert" a N-D image into a (N+1)-D image ?

or do you actually mean to perform an arithmetic addition between
the pixel values of the N-D image and the corresponding sub-region
of the (N+1)-D image ?


Do you need to do this many times ?

Would you be adding and removing always at the end ?
like a FIFO queue ? or do you plan to insert and remove
from arbitrary locations ?

... then default method that comes  to mind, will not
be an efficient way of doing this for many insertions
and deletions...

Also, please clarify if when you insert you want the new data
to replace a pre-existing region of the N+1 D image, or you
want the image to expand in extent.

Same for the removal: do you want to extract regions from
the N+1 D image and leave the original image untouched,
or do you want to also get a reduced (smaller) version of
the N+1 D image, that now is missing the N-D image that
you extracted.


   Please let us know,


            Thanks



                 Luis



--------------------------------------------------------------------------------------------
On Mon, Nov 30, 2009 at 6:40 AM, David Pastor <david.pastor at die.upm.es> 
wrote:
> Hello,
>
> I'd like to add an n dimensional image to a n+1 dimensional image. Also i
> would like to be able to remove selected subimages.
>
> I'm not sure if i can use TileImageFilter for that as the InputImages 
> would
> have different dimensions.
>
> pushbackinput(4d image)
> pushbackinput(3d image)
>
> out-> 4d image
>
> is this possible? any specific layout for it? even it would be great to be
> able to set the 3d image in any point of the 4d image like an 
> interleaving.
>
> I don't know if ExtractImageFilter could be used for the opposite either.
>
> Cheers,
> D. Pastor
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