[GEM-dev] USB 3.0 camera and Gem

[Jack]

Le 03/04/2012 12:38, Antoine Villeret a écrit :
> the framerate is not limited by the rj45 extender but by the camera 
> itself (in my case)
> and i think the bandwidth of the extender is wide enough to transfer 
> 120 fps @ 640x480
> and  you often can reduce the scan area of industrial camera sensor to 
> increase framerate
> for example a 640x480 sensor which outputs 90 fps can outputs 180 fps 
> @ 320x240

Yep, thanx for this precision Antoine.
What is the category of the cable you use for the connection between the 
two RJ45 extender ?
Your config is like that ? :
camera <=> Firewire 400 cable <=> RJ45 extender <=> CAT6 cable <=> RJ45 
extender <=> Firewire 400 cable <=> computer
or :
camera <=> Firewire 400 cable <=> RJ45 extender <=> CAT6 cable <=> computer
++

Jack


>
> ++
> a
>
>
> Le 3 avril 2012 11:34, Jack <jack at rybn.org <mailto:jack at rybn.org>> a 
> écrit :
>
>     Le 02/04/2012 09:48, Antoine Villeret a écrit :
>>     hi,
>>
>>     i got 60 fps in 640x480 / grayscale which is the default image
>>     configuration and the more bandwith expensive for this camera
>>
>>
>>     ++
>>     a
>>
>>
>>
>>
>>
>>     -- 
>>     do it yourself
>>     http://antoine.villeret.free.fr
>>     http://drii.ensad.fr
>>     --
>>     Google lit ce mail...
>>     si vous refusez cela, utilisez l'adresse antoine.villeret [at]
>>     free.fr <http://free.fr> pour me contacter
>>
>>
>>
>>     Le 1 avril 2012 15:42, Jack <jack at rybn.org
>>     <mailto:jack at rybn.org>> a écrit :
>>
>>         Le 01/04/2012 14:18, Antoine Villeret a écrit :
>>>         hi jack,
>>>
>>>         i'm using a firewire 400 over RJ45 extender (from AVT) on a
>>>         tour with an AVT Guppy
>>>         it's work fine with 50m cable, it should work at least until
>>>         100m but i never tried
>>>         it's not possible to use switch to increase the distance
>>>         with this kind of extender
>>>
>>>         you can use certain switches with GigE but it increases
>>>         latency i  think
>>>
>>>         another solution for very long distance (more than 100m) is
>>>         the optical fiber
>>>         you can find some firewire over optical fiber extender
>>>
>>>         Basler made a technical report on industrial cameras
>>>         interface here :
>>>         http://www.i2s-vision.fr/upload/BAS1108_Interfaces.pdf
>>>
>>>         hope this helps
>>>
>>>         ++
>>>         a.
>>>         -- 
>>>         do it yourself
>>>         http://antoine.villeret.free.fr
>>>         http://drii.ensad.fr
>>>         --
>>>         Google lit ce mail...
>>>         si vous refusez cela, utilisez l'adresse antoine.villeret
>>>         [at] free.fr <http://free.fr> pour me contacter
>>>
>>>
>>>
>>>         Le 1 avril 2012 13:56, Jack <jack at rybn.org
>>>         <mailto:jack at rybn.org>> a écrit :
>>>
>>>             Le 01/04/2012 02:22, Max a écrit :
>>>
>>>                 Am 01.04.2012 um 01:53 schrieb Jack:
>>>
>>>                     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 ?
>>>
>>>                 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.
>>>
>>>                 m.
>>>
>>>
>>>             Hello Max,
>>>
>>>             Did you ever tried that solution ?
>>>             Is it appropriate to detect very small movement and is
>>>             it enough fast to be used in real time (not to much
>>>             latency ?) ?
>>>             ++
>>>
>>>             Jack
>>>
>>>
>>>
>>>             _______________________________________________
>>>             GEM-dev mailing list
>>>             GEM-dev at iem.at <mailto:GEM-dev at iem.at>
>>>             http://lists.puredata.info/listinfo/gem-dev
>>>
>>>
>>
>>         Hello Antoine,
>>
>>         Thanx to share your configuration and the Basler technical
>>         report, it is a useful document.
>>         What is the resolution the framerate you get on your computer
>>         from your camera with that configuration ?
>>         ++
>>
>>         Jack
>>
>>
>>
>
>     OK. I would prefer a camera with 640x480 pixels at 120 fps minimum
>     to be more precise in the detection of very small movements.
>     ++
>
>     Jack
>
>
>

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