OpenNI-compatible cameras: Have you tried turning them off and on again? :)

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OpenNI-compatible cameras: Have you tried turning them off and on again? :)

dirkholz
Hi all,

in a multi-camera setup (high overlap) I'd like to capture a frame with one camera while having the projectors of the other cameras turned off. Has anyone already tried something like this? Do hardware/firmware/API support this at all (have not yet found anything related)?

Any help, experience, ideas highly appreciated ...

Best,
Dirk
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Re: OpenNI-compatible cameras: Have you tried turning them off and on again? :)

Matteo Munaro

Hi Dirk,

I don't know if this can be useful to you, but I heard about methods for reducing infrared interference by making the sensors vibrate.
An example is in this paper:
Butler, D. A., Izadi, S., Hilliges, O., Molyneaux, D., Hodges, S., & Kim, D. (2012, May). Shake'n'sense: reducing interference for overlapping structured light depth cameras. In Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems (pp. 1933-1936). ACM

Cheers,
Matteo


> Date: Thu, 14 Nov 2013 11:23:06 +0100

> From: [hidden email]
> To: [hidden email]
> Subject: [PCL-users] OpenNI-compatible cameras: Have you tried turning them off and on again? :)
>
> Hi all,
>
> in a multi-camera setup (high overlap) I'd like to capture a frame with one camera while having the projectors of the other cameras turned off. Has anyone already tried something like this? Do hardware/firmware/API support this at all (have not yet found anything related)?
>
> Any help, experience, ideas highly appreciated ...
>
> Best,
> Dirk
> _______________________________________________
> [hidden email] / http://pointclouds.org
> http://pointclouds.org/mailman/listinfo/pcl-users

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Re: OpenNI-compatible cameras: Have you tried turning them off and on again? :)

james
Administrator
In reply to this post by dirkholz
How quickly do you need to take images? It would be possible to start and stop the grabber, but starting the grabber takes quite some time, so you can use it for stills if you don't need the following frames quickly.
Unfortunately primesense cameras are only able to stream, not take single images (not efficiently, at least).
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Re: OpenNI-compatible cameras: Have you tried turning them off and on again? :)

dirkholz
But is the projector physically turned off when there is no grabber running. I need to re-check but right now I have the feeling that the projector is just running once there is power over USB, isn't it?

----- Original Message -----

> From: "james" <[hidden email]>
> To: [hidden email]
> Sent: Friday, November 15, 2013 1:46:55 AM
> Subject: Re: [PCL-users] OpenNI-compatible cameras: Have you tried turning them off and on again? :)
>
> How quickly do you need to take images? It would be possible to start and
> stop the grabber, but starting the grabber takes quite some time, so you can
> use it for stills if you don't need the following frames quickly.
> Unfortunately primesense cameras are only able to stream, not take single
> images (not efficiently, at least).
>
>
>
> --
> View this message in context:
> http://www.pcl-users.org/OpenNI-compatible-cameras-Have-you-tried-turning-them-off-and-on-again-tp4030764p4030779.html
> Sent from the Point Cloud Library (PCL) Users mailing list mailing list
> archive at Nabble.com.
> _______________________________________________
> [hidden email] / http://pointclouds.org
> http://pointclouds.org/mailman/listinfo/pcl-users
>
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Re: OpenNI-compatible cameras: Have you tried turning them off and on again? :)

Matteo Munaro

No, the projector is turned on only if there is a grabber running.

Matteo

> Date: Sun, 17 Nov 2013 20:08:03 +0100

> From: [hidden email]
> To: [hidden email]
> Subject: Re: [PCL-users] OpenNI-compatible cameras: Have you tried turning them off and on again? :)
>
> But is the projector physically turned off when there is no grabber running. I need to re-check but right now I have the feeling that the projector is just running once there is power over USB, isn't it?
>
> ----- Original Message -----
> > From: "james" <[hidden email]>
> > To: [hidden email]
> > Sent: Friday, November 15, 2013 1:46:55 AM
> > Subject: Re: [PCL-users] OpenNI-compatible cameras: Have you tried turning them off and on again? :)
> >
> > How quickly do you need to take images? It would be possible to start and
> > stop the grabber, but starting the grabber takes quite some time, so you can
> > use it for stills if you don't need the following frames quickly.
> > Unfortunately primesense cameras are only able to stream, not take single
> > images (not efficiently, at least).
> >
> >
> >
> > --
> > View this message in context:
> > http://www.pcl-users.org/OpenNI-compatible-cameras-Have-you-tried-turning-them-off-and-on-again-tp4030764p4030779.html
> > Sent from the Point Cloud Library (PCL) Users mailing list mailing list
> > archive at Nabble.com.
> > _______________________________________________
> > [hidden email] / http://pointclouds.org
> > http://pointclouds.org/mailman/listinfo/pcl-users
> >
> _______________________________________________
> [hidden email] / http://pointclouds.org
> http://pointclouds.org/mailman/listinfo/pcl-users

_______________________________________________
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