[vtkusers] stretching

[Luis Ibanez]

Hi Isabelle,


Thanks for letting us know that you were using
VTK for visualization.

...You should have said that from the beginning   :-)



Please look at the code in the file


         ImageSliceViewer.cxx


in the directory

     InsightApplications/
               LiverTumorSegmentation/


http://www.itk.org/cgi-bin/viewcvs.cgi/LiverTumorSegmentation/ImageSliceViewer.cxx?rev=1.3&root=InsightApplications&view=log


You will see in this class how to manage
the scale of your image in the method
SetupCamera(), in lines 118-185.



BTW, I'm assuming that you want to stretch the
image *WITHOUT* changing its aspect ratio. You
probably don't want to change the aspect ratio
of a Medical Image.


Note that *iff* your image has correctly specified
its pixel size in X and Y. VTK will take this pixel
size into account at the moment of rendering the
image.



    Regards,


       Luis



------------------------
Renaud Isabelle wrote:
> Hi everybody,
>  
> My job is to implement an MFC interface for medical image segmentation 
> purposes. Before, my lab was working on Matlab to display their data. 
> Default behavior of matlab is to display my image in parallel mode and 
> stretch the image to fill the best my window. It was a convenient way to 
> see our 1552*128 images. That is exactly what I want to reproduce in my 
> interface.
>  
> So, what I am desperately trying to do is to stretch my image (different 
> scale factors in x and y) to fit my render window.
>  
>  viewer->GetRenderer()->GetActiveCamera()->*ParallelProjectionOn*() is 
> OK, but
>  viewer->GetRenderer()->GetActiveCamera()->*SetParallelScale*() scale 
> not stretch my image.
>  There should be a way to stretch. 
>  
> Isabelle
> 
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