[PD] two webcam in gem
Jose Luis Santorcuato
santorcuato76 at gmail.com
Wed Aug 25 17:19:27 CEST 2010
Yes, we can, I have three cameras connect only limited by the usb ports, I
sometimes use a single gemhead, under it add up how many objects you want,
however I prefer to use for monitoring ctrack pidip , pdp libraries, those
pd are not in order for windows.
2010/8/25 IOhannes m zmoelnig <zmoelnig at iem.at>
> On 2010-08-24 21:51, Ricardo Brazileiro wrote:
> > hi all,
> > How can I use two webcam in Gem to tracking (pix_blob) ?
> use 2 [pix_video] objects.
> > Is it possible?
> > I have two webcam, /dev/video0 and /dev/video1. I tested using pix_video
> > I only change the device in the same window.
> the window has nothing to do with either the video grabbing nor the
> video analysis.
> you can grab video, run [pix_blob] on it and still only see a teapot :-)
> anyhow: pix_blob will only ever work on single pixes ("frames").
> if you want to use 2 cameras (e.g. to enlargen the viewing angle), you
> basically have 2 possibilities:
> - merge the two video streams into one, by using whatever compositing
> techniques you are easy with. a simple one would be to display both
> pixes (probably in a not-displayed [gemframebuffer]), and use [pix_snap]
> to grab the composited image). then run whatever analysis you want on
> the new big pix.
> - do analysis on each stream and then merge the results
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