[ros-users] Nodelet version of image_view

[Patrick Mihelich]

Hi Nick,

In your nodelet, do you call cvStartWindowThread()? This is what allows
image_view to update without explicitly calling cvWaitKey.

Cheers,
Patrick

On Sun, Dec 5, 2010 at 5:22 PM, Nicholas Butko <nbutko at ucsd.edu> wrote:

> I was trying what is essentially this (nodelet image_view) today. I am
> having a problem, and I don't know if it's unique problem to OSX, or not. If
> it's unique to OSX, I'll try to fix it in OpenCV, but if not, it's probably
> better to fix it in nodelet.
>
> The problem is that cvWaitKey never gets called from the main thread, and
> so the window content never updates. I have a perpetually white window.
> Calling cvWaitKey from the nodelet thread is not sufficient.
>
> If you guys want to try this from Ubuntu, I'm happy to send source.
>
> --Nick
>
>
> On Dec 5, 2010, at 2:24 PM, Radu Bogdan Rusu wrote:
>
> > Bill, if you want to do that, I can do the point cloud part (pcd_viewer).
> Save some cycles, split some work. :)
> >
> >
> > On 12/05/2010 02:23 PM, Bill Morris wrote:
> >> On Sun, 2010-12-05 at 14:15 -0800, Radu Bogdan Rusu wrote:
> >> ...
> >>> Speaking of GUIs, it would be really nice to get
> image_view/rviz/pcd_viewer to have a nodelet component for displaying
> >>> data fast(er). Do you see any drawbacks of nodelets w. GUIs? If not, I
> might try to do the image_view/pcd_viewer part
> >>> next week as an exercise.
> >>
> >> I would really like to see a nodelet version of image_view if only to
> >> ensure proper operation of a nodelet camera driver.
> >
> >
> > Cheers,
> > Radu.
> > --
> > http://pointclouds.org
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>
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