detection of any movement
101 views
Skip to first unread message
Cato
Nov 12, 2012, 6:35:39 AM11/12/12
to openn...@googlegroups.com
Hi, Let's say that we have such a situation. I would like to hang Asus xtion pro ceiling so that he looked at the floor. So the user will see in advance and can be hard to calibration. But the catch. Is there a chance that the device be programmed to detect any movement? For example, I'm standing outside the camera and just put in the viewer xtion'a hand. I would like to at this point was no longer any interaction. I do not care diagnosis of hand, foot, head, etc. The interaction has to be where something appears. Is this possible?
Bhavna Agarwal
Nov 12, 2012, 9:28:50 AM11/12/12
to openn...@googlegroups.com
The easiest approach to detect motion blobs would be via frame
differencing. Check OpenCV lib.
> --
> You received this message because you are subscribed to the Google Groups
> "OpenNI" group.
> To view this discussion on the web visit
> https://groups.google.com/d/msg/openni-dev/-/LHagO7Bqg0QJ.
> To post to this group, send email to openn...@googlegroups.com.
> To unsubscribe from this group, send email to
> openni-dev+...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/openni-dev?hl=en.
differencing. Check OpenCV lib.
> You received this message because you are subscribed to the Google Groups
> "OpenNI" group.
> To view this discussion on the web visit
> https://groups.google.com/d/msg/openni-dev/-/LHagO7Bqg0QJ.
> To post to this group, send email to openn...@googlegroups.com.
> To unsubscribe from this group, send email to
> openni-dev+...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/openni-dev?hl=en.
Pedro Ribeiro
Nov 13, 2012, 4:45:30 AM11/13/12
to openn...@googlegroups.com
Hi there!
Frame differencing as Agarwal mentioned or motion vectors (optical flow), also easy to compute with OpenCV. With Optical flow you will have the direction and "intensity" of the movement.
CoVii - Computer Vision Interaction
Frame differencing as Agarwal mentioned or motion vectors (optical flow), also easy to compute with OpenCV. With Optical flow you will have the direction and "intensity" of the movement.
CoVii - Computer Vision Interaction
Bhavna Agarwal
Nov 13, 2012, 8:44:28 AM11/13/12
to openn...@googlegroups.com
About optical flow, how bad a resolution can be handled decently?
Also, what about light conditions? I might need to project content on
the wall, requiring the room to be significantly dark.
Also, what about light conditions? I might need to project content on
the wall, requiring the room to be significantly dark.
> --
> You received this message because you are subscribed to the Google Groups
> "OpenNI" group.
> To view this discussion on the web visit
> https://groups.google.com/d/msg/openni-dev/-/4KyUSoEhThsJ.
> You received this message because you are subscribed to the Google Groups
> "OpenNI" group.
> To view this discussion on the web visit
Pedro Ribeiro
Nov 13, 2012, 11:20:19 AM11/13/12
to openn...@googlegroups.com
You can also compute optical flow on the depth image...
check viim sdk (viim.pt), we compute optical flow vectors on the depth image (works with no light and is tested on 320x240).
Nevertheless, if one don't need the motion vectors, only the location where changes occur, frame differencing seems a good possibility.
ciao,
pedro
CoVii - Computer Vision Interaction
check viim sdk (viim.pt), we compute optical flow vectors on the depth image (works with no light and is tested on 320x240).
Nevertheless, if one don't need the motion vectors, only the location where changes occur, frame differencing seems a good possibility.
ciao,
pedro
CoVii - Computer Vision Interaction
Reply all
Reply to author
Forward
0 new messages