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2 kinects question
https://forum.ipisoft.com/viewtopic.php?f=5&t=6034		 Page 1 of 1
Author:  Smo333 [ Mon May 14, 2012 7:29 am ]
Post subject:  2 kinects question
Hi,

I use 2 kinects configuration and I noticed something strange in the ipi recorder.
I use the 180 degrees mode.

When I launch the ipi recorder i get the first picture but if I cover one of the kinects with something I get the second picture.
As you can see the floor is much accurate. What could be the problem?
I've got one kinect connected to the pc with no extension cable, and one with an Active USB cable (5m).
My frame drops are normal.

Thanks.

Attachments:
DualKinects01.jpg
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DualKinects02.jpg
DualKinects02.jpg [ 124.04 KiB | Viewed 13953 times ]
Author:  vmaslov [ Mon May 14, 2012 7:45 am ]
Post subject:  Re: 2 kinects question
Hi

It's a known issue. Infrared emitters of depth sensors are interfering with each other causing noise in images of infrared cameras. This effect should be less in 90 degree configuration.
Author:  Smo333 [ Mon May 14, 2012 7:58 am ]
Post subject:  Re: 2 kinects question
vmaslov wrote:
Hi

It's a known issue. Infrared emitters of depth sensors are interfering with each other causing noise in images of infrared cameras. This effect should be less in 90 degree configuration.


Thank you very much. I'll try the 90 degree configuration than.
Author:  vmaslov [ Mon May 14, 2012 8:21 am ]
Post subject:  Re: 2 kinects question
If you have some technical skills, you may also try to reduce mutual interference with the Shake 'n' Sense technique: http://www.youtube.com/watch?v=CSBDY0RuhS4
Author:  boneym [ Tue May 15, 2012 5:56 pm ]
Post subject:  Re: 2 kinects question
Yes it is because your kinects are looking at each other.

Vibrate one or both of your connects and offset the angles slightly.

Use camera 1 for the front view and camera 2 for the back view.

Put camera low and camera 2 high with offsetting angles.

Thanks and Cheers
Author:  Michael Nikonov [ Wed May 16, 2012 12:44 pm ]
Post subject:  Re: 2 kinects question
By the way, you can achieve some improvement in 180-degrees configuration simply by slightly adjusting orientation of both Kinects. That's because Kinect's IR light emmiter has some interesting diffraction effect in certain orientations. An adjustment of 1-2 degrees can make all the difference.
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