[vtkusers] 2D projections of 3D vtkImageData

[Amy Squillacote]

Hi Adrian,

I'm copying this back to the vtkusers list so other people can see this 
clarification and help you find a solution. Please keep the discussion 
on the list.

Thanks,
Amy

Adrian Albert wrote:
> Hi Amy,
>
>
> thanks again for replying!
> In fact, by projection I meant accumulating all data values from a N D 
> object onto a N-1 D object. For example, for the 2D->1D case, this 
> would mean accumulating (e.g., summing) all the values on the vertical 
> axis from the 2D image corresponding to a certain value on the 
> horizontal axis. The final image will be 1D and would store for each 
> value on the horizontal axis the sum of the values corresponding to 
> this value from the initial 2D image.
>
> In my case, I have a vtkImageData containing a 3D histogram (histogram 
> depending on 3 variables) obtained with vtkImageAccumulate, which I 
> would like to make 2D (i.e., get a 2D projection of it).
>
> I am browsing through the documentation, but so far I haven't found 
> what I need....
>
>
> Adrian
>
> On Thu, May 1, 2008 at 3:20 PM, Amy Squillacote <ahs at cfdrc.com 
> <mailto:ahs at cfdrc.com>> wrote:
>
>     Have you looked at vtkCutter:
>     http://www.vtk.org/doc/release/5.0/html/a01277.html?
>
>     - Amy
>
>     Adrian Albert wrote:
>
>         Dear All
>
>         I was wondering if there is a specialized class for making 2D
>         projections out of 3D data, or more general to make N-1 D
>         projections from N D data. Thus from a 1D line one would get a
>         point, from a 2D image on would get a 1D line, and from a 3D
>         volume one would get a 2D image.
>
>         Any ideas?
>
>         best,
>         Adrian
>
>         -- 
>         ---------------------------------------------------
>         Adrian Albert
>         School of Engineering and Science
>         Jacobs University Bremen
>         Germany
>         Tel.: 00494212003258
>         ------------------------------------------------------------------------
>
>         _______________________________________________
>         This is the private VTK discussion list.
>         Please keep messages on-topic. Check the FAQ at:
>         http://www.vtk.org/Wiki/VTK_FAQ
>         Follow this link to subscribe/unsubscribe:
>         http://www.vtk.org/mailman/listinfo/vtkusers
>          
>
>
>     -- 
>     Amy Squillacote                    Phone: (256) 726-4839
>     Computer Scientist                 Fax: (256) 726-4806
>     CFD Research Corporation           Web: http://www.cfdrc.com
>     215 Wynn Drive, Suite 501
>     Huntsville, AL  35805
>
>
>
>
>
> -- 
> ---------------------------------------------------
> Adrian Albert
> School of Engineering and Science
> Jacobs University Bremen
> Germany
> Tel.: 00494212003258 

-- 
Amy Squillacote                    Phone: (256) 726-4839
Computer Scientist                 Fax: (256) 726-4806
CFD Research Corporation           Web: http://www.cfdrc.com
215 Wynn Drive, Suite 501
Huntsville, AL  35805