[vtkusers] Image coords and image transformation

[Jothybasu Selvaraj]

You could use vtkWorldPointPicker to do that. But I am afraid that it would
give you the correct coordinate, since you are transforming your actor.

Rather I would suggest you to manipulate the camera and use the
worldPointPicker.


Jothy

On Mon, May 21, 2012 at 9:06 PM, Fabian Torres <fabian.trobles at gmail.com>wrote:

> Hi.
>
> I would try to explain my problem the best I can.
>
> I have some ultrasound images that have certain position, orientation and
> scale in a world space coordinate.
>
> To display each image in vtk scene I have used vtkTransform in the
> vtkImageActor for each image:
>
> actor->SetInput(image);
> actor->SetTransform(transform);
>
>
> I´m able to display the images in the correct position and orientation in
> the vtk scene. This has not been a problem.
>
> Now, the problem I have is that I want to access the vtkImageData from its
> world space coordinate, not the image coords.
>
> Example if I want to access the pixel (0,0,0) image coords meaning the
> first pixel of the imageData, and I know that this pixel is located in
> the coordinate (100,130,89) in the world space. How can I access to the
> data of this pixel using the world space coordinates?  Can I access
> the imageData from the actor?
>
> --
> Fabián Torres Robles
> Maestria en Ciencias en Ingeniería Electrónica
> Ingeniería en Sistemas Electrónicos
> tel. 58081280, 0445534661338
> e-mail fabian.trobles at gmail.com, dae.wong at gmail.com
>
>
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-- 
Jothy
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