[vtkusers] Set VTKCamera intrinsics

[Bill Lorensen]

Yes, but the method is SetViewAngle.



On Fri, Aug 2, 2013 at 12:52 PM, alykhantejani <
alykhan.tejani06 at imperial.ac.uk> wrote:

> I know we can set the viewing angle with vtkCamera::SetViewingAngle and
> also the focal length can then be determined from this angle and the image
> dimensions. Additionally the principle point can be worked out from the
> image dimensions. So does the vtkCamera make use of the viewing angle?
>
> Thanks
>
>
>
> On 02/08/13 17:48, Bill Lorensen [via VTK] wrote:
>
>  It would be great to have a vtkCalibratedCamera (or something) that
> would take the cameras intrinsic parameters.
>
>  The Point Cloud Library (PCL) http://www.pointclouds.org/ uses VTK for
> rendering. PCL may already have such a beast or at least a conversion from
> intrinsics to vtkCamera.
>
>
>
>
> On Fri, Aug 2, 2013 at 12:14 PM, alykhantejani <[hidden email]<http://user/SendEmail.jtp?type=node&node=5722399&i=0>
> > wrote:
>
>> I am trying to render views of a 3D mesh in VTK, I am doing the following:
>>
>>
>>     vtkSmartPointer<vtkRenderWindow> render_win =
>> vtkSmartPointer<vtkRenderWindow>::New();
>>     vtkSmartPointer<vtkRenderer> renderer =
>> vtkSmartPointer<vtkRenderer>::New();
>>
>>     render_win->AddRenderer(renderer);
>>     render_win->SetSize(640, 480);
>>
>>     vtkSmartPointer<vtkCamera> cam = vtkSmartPointer<vtkCamera>::New();
>>
>>     cam->SetPosition(50, 50, 50);
>>     cam->SetFocalPoint(0, 0, 0);
>>     cam->SetViewUp(0, 1, 0);
>>     cam->Modified();
>>
>>     vtkSmartPointer<vtkActor> actor_view =
>> vtkSmartPointer<vtkActor>::New();
>>
>>     actor_view->SetMapper(mapper);
>>     renderer->SetActiveCamera(cam);
>>     renderer->AddActor(actor_view);
>>
>>     render_win->Render();
>>
>> I am trying to simulate a rendering from a calibrated Kinect, for which I
>> know the intrinsic parameters. How can I set the intrinsic parameters
>> (focal
>> length and principle point) to the vtkCamera.
>>
>> I wish to do this so that the 2d pixel - 3d camera coordinate would be the
>> same as if the image were taken from a kinect.
>>
>> Thanks
>>
>>
>>
>>
>> --
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>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com
>
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-- 
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