[vtkusers] vtkImageViewer2 with RGBA vtkImageBlend

[Mathieu Malaterre]

Hi Jason,

  Could you please give a try to my recent patch:

http://public.kitware.com/pipermail/vtk-developers/2007-August/004687.html

HTH
-Mathieu

On 7/12/07, Jason Crane <jasonc at radiology.ucsf.edu> wrote:
>
> Hi,
>
> I'm interested in generating a color overlay of one image on top of a
> 2nd gray scale reference image in a viewer with zoom, pan, resize functionality.
> I've been using vtkImageBlend to combine a color and gray scale image (both RGBA)
> into a single vtkImageData object (RGBA). This renders fine when used as the input
> to vtkImageViewer. However in vtkImageViewer2, although the initial rendering looks
> fine, any window-level event causes the rendered image to revert completely to
> gray scale in the viewer. I am able to set a LUT via the vtkImageViewer2's
> vtkImageMapToWindowLevelColors:
>
>
> vtkImageViewer2* viewer = vtkImageViewer2::New();
> viewer->GetWindowLevel()->SetLookupTable(lut)
>
>
> but this only seems to work if my input vtkImageData is a single compoent scalar.
>
>
> Is there a better way to accomplish this, or a way to add pan, resize, zoom
> to vtkImageViewer?
>
>
> Thanks in advance for any advice.
>
>
> -Jason
>
>
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-- 
Mathieu