<span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" id="result_box" class="long_text">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.</span><br><br>Best regards<br><br>José<br><br><div class="gmail_quote">2010/8/25 IOhannes m zmoelnig <span dir="ltr"><<a href="mailto:zmoelnig@iem.at">zmoelnig@iem.at</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On 2010-08-24 21:51, Ricardo Brazileiro wrote:<br>
> hi all,<br>
><br>
> How can I use two webcam in Gem to tracking (pix_blob) ?<br>
<br>
</div>use 2 [pix_video] objects.<br>
<br>
><br>
> Is it possible?<br>
<br>
yes.<br>
<div class="im"><br>
><br>
> I have two webcam, /dev/video0 and /dev/video1. I tested using pix_video but<br>
> I only change the device in the same window.<br>
<br>
</div>the window has nothing to do with either the video grabbing nor the<br>
video analysis.<br>
you can grab video, run [pix_blob] on it and still only see a teapot :-)<br>
<br>
anyhow: pix_blob will only ever work on single pixes ("frames").<br>
if you want to use 2 cameras (e.g. to enlargen the viewing angle), you<br>
basically have 2 possibilities:<br>
- merge the two video streams into one, by using whatever compositing<br>
techniques you are easy with. a simple one would be to display both<br>
pixes (probably in a not-displayed [gemframebuffer]), and use [pix_snap]<br>
to grab the composited image). then run whatever analysis you want on<br>
the new big pix.<br>
<br>
- do analysis on each stream and then merge the results<br>
<br>
gfmasdr<br>
<font color="#888888">IOhannes<br>
<br>
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