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<div class="moz-cite-prefix">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?<br>
<br>
Thanks<br>
<br>
<br>
On 02/08/13 17:48, Bill Lorensen [via VTK] wrote:<br>
</div>
<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em'
cite="mid:CADZJ4hN=jMg-pFGTtq3RUL2sB+FEcPZVPvbZKtXJU=oipWOHvg@mail.gmail.com"
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<div>It would be great to have a vtkCalibratedCamera (or
something) that would take the cameras intrinsic parameters.<br>
<br>
</div>
The Point Cloud Library (PCL) <a moz-do-not-send="true"
href="http://www.pointclouds.org/" target="_top" rel="nofollow" link="external">http://www.pointclouds.org/</a>
uses VTK for rendering. PCL may already have such a beast or at
least a conversion from intrinsics to vtkCamera.<br>
<br>
<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Aug 2, 2013 at 12:14 PM,
alykhantejani <span dir="ltr"><<a moz-do-not-send="true"
href="/user/SendEmail.jtp?type=node&node=5722399&i=0"
target="_top" rel="nofollow" link="external">[hidden
email]</a>></span> wrote:<br>
<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' style="border-left:2px solid #CCCCCC;padding:0
1em" class="gmail_quote">I am trying to render views of a 3D
mesh in VTK, I am doing the following:<br>
<br>
<br>
vtkSmartPointer<vtkRenderWindow> render_win =<br>
vtkSmartPointer<vtkRenderWindow>::New();<br>
vtkSmartPointer<vtkRenderer> renderer =<br>
vtkSmartPointer<vtkRenderer>::New();<br>
<br>
render_win->AddRenderer(renderer);<br>
render_win->SetSize(640, 480);<br>
<br>
vtkSmartPointer<vtkCamera> cam =
vtkSmartPointer<vtkCamera>::New();<br>
<br>
cam->SetPosition(50, 50, 50);<br>
cam->SetFocalPoint(0, 0, 0);<br>
cam->SetViewUp(0, 1, 0);<br>
cam->Modified();<br>
<br>
vtkSmartPointer<vtkActor> actor_view =
vtkSmartPointer<vtkActor>::New();<br>
<br>
actor_view->SetMapper(mapper);<br>
renderer->SetActiveCamera(cam);<br>
renderer->AddActor(actor_view);<br>
<br>
render_win->Render();<br>
<br>
I am trying to simulate a rendering from a calibrated
Kinect, for which I<br>
know the intrinsic parameters. How can I set the intrinsic
parameters (focal<br>
length and principle point) to the vtkCamera.<br>
<br>
I wish to do this so that the 2d pixel - 3d camera
coordinate would be the<br>
same as if the image were taken from a kinect.<br>
<br>
Thanks<br>
<br>
<br>
<br>
<br>
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<br>
-- <br>
Unpaid intern in BillsBasement at noware dot com<br>
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