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Le 03/04/2012 12:38, Antoine Villeret a écrit :
<blockquote
cite="mid:CAGn5wNdRhzf+fozvHiqAnKyxnKuDejEB-ADGwz=aDq18toNpbA@mail.gmail.com"
type="cite">the framerate is not limited by the rj45 extender but
by the camera itself (in my case)<br>
and i think the bandwidth of the extender is wide enough to
transfer 120 fps @ 640x480<br>
and you often can reduce the scan area of industrial camera
sensor to increase framerate<br>
for example a 640x480 sensor which outputs 90 fps can outputs 180
fps @ 320x240<br>
</blockquote>
<br>
Yep, thanx for this precision Antoine.<br>
What is the category of the cable you use for the connection between
the two RJ45 extender ?<br>
Your config is like that ? :<br>
camera <=> Firewire 400 cable <=> RJ45 extender
<=> CAT6 cable <=> RJ45 extender <=> Firewire 400
cable <=> computer<br>
or :<br>
camera <=> Firewire 400 cable <=> RJ45 extender
<=> CAT6 cable <=> computer<br>
++<br>
<br>
Jack<br>
<br>
<br>
<blockquote
cite="mid:CAGn5wNdRhzf+fozvHiqAnKyxnKuDejEB-ADGwz=aDq18toNpbA@mail.gmail.com"
type="cite"><br>
++<br>
a<br>
<br>
<br>
<div class="gmail_quote">Le 3 avril 2012 11:34, Jack <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:jack@rybn.org">jack@rybn.org</a>></span> a
écrit :<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Le 02/04/2012 09:48,
Antoine Villeret a écrit :
<div>
<div class="h5">
<blockquote type="cite">hi,<br>
<br>
i got 60 fps in 640x480 / grayscale which is the
default image configuration and the more bandwith
expensive for this camera<br>
<br>
<br>
++<br>
a<br>
<br>
<br>
<br>
<br>
<br clear="all">
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<br>
<br>
<div class="gmail_quote">Le 1 avril 2012 15:42, Jack <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:jack@rybn.org" target="_blank">jack@rybn.org</a>></span>
a écrit :<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Le
01/04/2012 14:18, Antoine Villeret a écrit :
<div>
<div>
<blockquote type="cite">hi jack, <br>
<br>
i'm using a firewire 400 over RJ45
extender (from AVT) on a tour with an AVT
Guppy<br>
it's work fine with 50m cable, it should
work at least until 100m but i never tried<br>
it's not possible to use switch to
increase the distance with this kind of
extender<br>
<br>
you can use certain switches with GigE but
it increases latency i think<br>
<br>
another solution for very long distance
(more than 100m) is the optical fiber <br>
you can find some firewire over optical
fiber extender<br>
<br>
Basler made a technical report on
industrial cameras interface here :<br>
<a moz-do-not-send="true"
href="http://www.i2s-vision.fr/upload/BAS1108_Interfaces.pdf"
target="_blank">http://www.i2s-vision.fr/upload/BAS1108_Interfaces.pdf</a><br>
<br>
hope this helps <br>
<br>
++<br>
a.<br clear="all">
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pour me contacter<br>
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<br>
<br>
<div class="gmail_quote">Le 1 avril 2012
13:56, Jack <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jack@rybn.org"
target="_blank">jack@rybn.org</a>></span>
a écrit :<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> Le 01/04/2012
02:22, Max a écrit :<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> Am
01.04.2012 um 01:53 schrieb Jack:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> PS : does
anybody tried an other solution
(like GigE or
USB<->Ethernet<->USB)
with Gem when you need long
distance between camera and
computer ? Is it very stable ?<br>
</blockquote>
I could offer vnc access to a os x
or ubuntu machine hooked up to
either a Allied Vision Tech GigE or
Firewire 800 camera.<br>
<br>
m.<br>
</blockquote>
<br>
Hello Max,<br>
<br>
Did you ever tried that solution ?<br>
Is it appropriate to detect very small
movement and is it enough fast to be
used in real time (not to much latency
?) ?<br>
++<br>
<br>
Jack<br>
<br>
<br>
<br>
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target="_blank">http://lists.puredata.info/listinfo/gem-dev</a><br>
</blockquote>
</div>
<br>
</blockquote>
<br>
</div>
</div>
Hello Antoine,<br>
<br>
Thanx to share your configuration and the Basler
technical report, it is a useful document.<br>
What is the resolution the framerate you get on
your computer from your camera with that
configuration ?<br>
++<span><font color="#888888"><br>
<br>
Jack<br>
<br>
<br>
</font></span></div>
</blockquote>
</div>
<br>
</blockquote>
<br>
</div>
</div>
OK. I would prefer a camera with 640x480 pixels at 120 fps
minimum to be more precise in the detection of very small
movements.<br>
++<span class="HOEnZb"><font color="#888888"><br>
<br>
Jack<br>
<br>
<br>
</font></span></div>
</blockquote>
</div>
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</blockquote>
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