[vtkusers] Draw contour of segmentation in a vtkImage

[David Gobbi]

Hi Sergio,

Here are some methods that can be used:

1) Use vtkCutter to convert the polydata into a 2D contour, and then use
vtkTubeFilter to thicken the contour for better visibility.

2) Instead of vtkTubeFilter to thicken the contour, you can use
vtkContourTriangulator to fill the contour.

3) Render the 3D polydata as a wireframe, so that you can see the image
through the mesh.

 - David



On Tue, Feb 10, 2015 at 9:29 AM, Sergio Vera <sergio.vera at alma3d.com> wrote:

> Dear vtk users
>
> I have a vtkImage with a CT and some segmentations as vtkPolyData,
>
> Currently I draw the vtkPolyData on top of the image but the image is
> hidden by the meshes.
> I would like to represent the segmentation as contours in the image.
>
> I have tried to use vtkPolyDataMapper with two slice planes to display
> just a thin portion of the mesh but the result is subpar.
>
> Is there any better way to display my segmentations as (possibly filled
> with a semitransparent color) a contour over the image?
>
> Best regards
>
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