<div dir="ltr"><div><div>Please keep the list cc'ed for these emails.<br><br></div>VTK's camera is opengl oriented.<br><br></div>Position, FocalPoint, ViewUp, and ViewAngle are the parameters. I'm not sure how these map to camera intrinsics.<br>
<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Aug 2, 2013 at 12:56 PM, Alykhan Tejani <span dir="ltr"><<a href="mailto:alykhan.tejani06@imperial.ac.uk" target="_blank">alykhan.tejani06@imperial.ac.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Yes it would be great if there was a
clearer version, but I guess I'm asking if by setting the view
angle are we effectively using the intrinsics? i.e. do you know if
vtk works out the focal length and the principle point from this
information?<br>
<br>
Thanks<div><div class="h5"><br>
<br>
On 02/08/13 17:55, Bill Lorensen wrote:<br>
</div></div></div><div><div class="h5">
<blockquote type="cite">
<div dir="ltr">Yes, but the method is SetViewAngle.<br>
<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Aug 2, 2013 at 12:52 PM,
alykhantejani <span dir="ltr"><<a href="mailto:alykhan.tejani06@imperial.ac.uk" target="_blank">alykhan.tejani06@imperial.ac.uk</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>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
<div><br>
<br>
<br>
On 02/08/13 17:48, Bill Lorensen [via VTK] wrote:<br>
</div>
</div>
<blockquote style="border-left:2px solid #cccccc;padding:0 1em" type="cite">
<div>
<div dir="ltr">
<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 href="http://www.pointclouds.org/" rel="nofollow" link="external" target="_blank">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>
<div>
<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 href="http://user/SendEmail.jtp?type=node&node=5722399&i=0" rel="nofollow" link="external" target="_blank">[hidden
email]</a>></span> wrote:<br>
<blockquote 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>
--<br>
View this message in context: <a href="http://vtk.1045678.n5.nabble.com/Set-VTKCamera-intrinsics-tp5722396.html" rel="nofollow" link="external" target="_blank">http://vtk.1045678.n5.nabble.com/Set-VTKCamera-intrinsics-tp5722396.html</a><br>
Sent from the VTK - Users mailing list archive
at Nabble.com.<br>
_______________________________________________<br>
Powered by <a href="http://www.kitware.com" rel="nofollow" link="external" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" rel="nofollow" link="external" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK
FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" rel="nofollow" link="external" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.vtk.org/mailman/listinfo/vtkusers" rel="nofollow" link="external" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
Unpaid intern in BillsBasement at noware dot com<br>
</div>
<br>
_______________________________________________ <br>
Powered by <a href="http://www.kitware.com" rel="nofollow" link="external" target="_blank">www.kitware.com</a>
<br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" rel="nofollow" link="external" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK FAQ
at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" rel="nofollow" link="external" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe: <br>
<a href="http://www.vtk.org/mailman/listinfo/vtkusers" rel="nofollow" link="external" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
<br>
<br>
</div>
</div>
<hr color="#cccccc" noshade size="1">
<div style="color:#444;font:12px tahoma,geneva,helvetica,arial,sans-serif">
<div style="font-weight:bold">If you reply to this
email, your message will be added to the discussion
below:</div>
<a href="http://vtk.1045678.n5.nabble.com/Set-VTKCamera-intrinsics-tp5722396p5722399.html" rel="nofollow" link="external" target="_blank">http://vtk.1045678.n5.nabble.com/Set-VTKCamera-intrinsics-tp5722396p5722399.html</a>
</div>
<div style="color:#666;font:11px tahoma,geneva,helvetica,arial,sans-serif;margin-top:.4em;line-height:1.5em">
To unsubscribe from Set VTKCamera intrinsics, <a rel="nofollow" link="external">click
here</a>.<br>
<a href="http://vtk.1045678.n5.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml" rel="nofollow" style="font:9px serif" link="external" target="_blank">NAML</a> </div>
</blockquote>
<br>
<br>
<hr align="left" width="300">
View this message in context: <a href="http://vtk.1045678.n5.nabble.com/Set-VTKCamera-intrinsics-tp5722396p5722400.html" target="_blank">Re: Set VTKCamera intrinsics</a>
<div>
<div><br>
Sent from the <a href="http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html" target="_blank">VTK - Users mailing list archive</a>
at Nabble.com.<br>
</div>
</div>
<br>
_______________________________________________<br>
Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
<br>
</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
Unpaid intern in BillsBasement at noware dot com<br>
</div>
</blockquote>
<br>
</div></div></div>
</blockquote></div><br><br clear="all"><br>-- <br>Unpaid intern in BillsBasement at noware dot com<br>
</div>