[vtkusers] How to pick the real coords of an image

[Sylvie RIGOT]

Hi all,

I have to display an image with vtk and when the user click on this image,
I have to pick the coordinate of the click.
But when the image is displayed, its size is modified by a reduction factor to fit in the window (same problem with zoom).
Have you any idea how I can pick the real coordinates of the click on the image?

Thanks for answers,
Bye
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