Forums > Jitter

cameras for (near) IR motion tracking — firefly problems

March 24, 2007 | 3:28 pm


March 24, 2007 | 4:26 pm


March 24, 2007 | 4:39 pm


March 24, 2007 | 7:35 pm


March 24, 2007 | 8:41 pm


March 24, 2007 | 9:50 pm

On Mar 24, 2007, at 9:41 PM, yair reshef wrote:

> better do some searching before you ask man

sorry, got way too much on my hands and hitting reply went faster
than changing to google -which is strange because it seems that’s all
i’ve been doing the last days.
so, thank you, but now please lighten up : )


March 25, 2007 | 1:11 am

hello again,
would really like to help a little bit more, but:
1.) whith IR do you mean Infra-Red connection to your controller (computer), or just the possibility to get Infra-Red-Informations?
The Fire-I camera has no IR-Connection. Just the Firewire-cable.
2.) with 10 meter distance… the distance between the object and the camera, or the distance between the camera and the computer?
I didn’t try it, but with firewire you can reach up to a distance of 72 meters between the camera and the computer. how the quality of the image is after that, I don’t know, really.
Bon nuit,
Johannes


March 25, 2007 | 8:44 am

10m cabels are the recommended limit for fire wire cables without a signal
booster.
unibrain and other sell the 10m cables.
i am working with this with 2 unibrain cameras daisy chained, also passing
power to the camera.
infra red video has been discussed extensively on the list before. i learned
alot from searching the archive. leave google alone and search the forum.
when you run the search try doing ths ascending order, most question has
been answered once by a knowledgeable person, and nobody likes repeating
oneself.
http://www.cycling74.com/forums/index.php?t=msg&goto=80360

http://www.cycling74.com/forums/index.php?t=msg&goto=39349

some more out there, if i came out harsh i blame only police brutality.

On 3/25/07, Johannes wrote:
>
>
> hello again,
> would really like to help a little bit more, but:
> 1.) whith IR do you mean Infra-Red connection to your controller
> (computer), or just the possibility to get Infra-Red-Informations?
> The Fire-I camera has no IR-Connection. Just the Firewire-cable.
> 2.) with 10 meter distance… the distance between the object and the
> camera, or the distance between the camera and the computer?
> I didn’t try it, but with firewire you can reach up to a distance of 72
> meters between the camera and the computer. how the quality of the image is
> after that, I don’t know, really.
> Bon nuit,
> Johannes
>


March 25, 2007 | 10:32 am

> i learned alot from searching the archive
thanks for the links, did search the forum you know, even got some
nice answers out of that. just not on the unibrain, cause i was too
impatient.
but yes, i meant 10 m as an example of longer han the firewire
recommended length, it very well maybe more 12 or 15, hard to measure
here as it depends on some factors such as where we can reach with
the platform that comes later this week (the place is 8 metres high).
i was thinking of active cables and boosting really, should’ve been
more specific. but if these cables are really that good, maybe i can
get by with them.
you have these repeater boxes, but a friend has had mixed results
with it.
got another computer and it seems the firefly is working on that, in
max, though not at the promised 60fps, but it has great nIR response.
then again, it’s a really slow box. 1 out of five tried computers/
os’s is pretty bad result though.

> On 3/25/07, Johannes wrote:
>
> hello again,
> would really like to help a little bit more, but:
> 1.) whith IR do you mean Infra-Red connection to your controller
> (computer), or just the possibility to get Infra-Red-Informations?
i mean to get infra red light response. some camera’s are more
responsive in this area, some have ir blocking filters.
> 2.) with 10 meter distance… the distance between the object and
> the camera, or the distance between the camera and the computer?
i really meant 10m or more, from camera to computer.
> I didn’t try it, but with firewire you can reach up to a distance
> of 72 meters between the camera and the computer.
maybe with fibre optic cables or active cables, but not with the
regular ones, i’ve even had trouble geting 8 metres out of some.

thanks

isjtar


March 25, 2007 | 11:32 am

>
>2.) with 10 meter distance… the distance between the object and
>the camera, or the distance between the camera and the computer?
>I didn’t try it, but with firewire you can reach up to a distance of
>72 meters between the camera and the computer. how the quality of
>the image is after that, I don’t know, really.

the longest cables i found were 10 meters, I used to daisy chain up
to 4 webcams (Fire-i) – it worked. At some point I bought some
powered FW hubs, it also worked…

best

kasper

Kasper T. Toeplitz
noise, composition, bass, computer

http://www.sleazeArt.com

http://www.myspace.com/sleazeart


March 25, 2007 | 11:36 am

so, some evolution here. we got the firefly working in quicktime on osx.
but… we get the same error everybody seems to get in max:
in normal mode: -error 536870212 setting vdig compression type
if we use vdig mode: error setting video digitizer component
but since it is running in quicktime, i induce that it should work in
jitter too?
the problem seems to be compression type, we need to set it too raw
that’s the native compression type for this camera, but it’s not in
the settings menu.
the computer is a macbook pro core2 duo 2.33 Ghz, 2gb ram, with max
msp 4.6.2 jitter 1.6.2 quicktime 7.1.3 on osx 10.4.8
the camera is a point grey firefly MV, which should be IIRC
compliant, but we used the ioxpert industrial camera driver and soft
vdigx to get it running.

any help greatly appreciated and i’ll try not go associative in my
replies without searching anymore ; )

thanks

isj

On Mar 25, 2007, at 12:32 PM, isjtar wrote:

>> i learned alot from searching the archive
> thanks for the links, did search the forum you know, even got some
> nice answers out of that. just not on the unibrain, cause i was too
> impatient.
> but yes, i meant 10 m as an example of longer han the firewire
> recommended length, it very well maybe more 12 or 15, hard to
> measure here as it depends on some factors such as where we can
> reach with the platform that comes later this week (the place is 8
> metres high).
> i was thinking of active cables and boosting really, should’ve been
> more specific. but if these cables are really that good, maybe i
> can get by with them.
> you have these repeater boxes, but a friend has had mixed results
> with it.
> got another computer and it seems the firefly is working on that,
> in max, though not at the promised 60fps, but it has great nIR
> response.
> then again, it’s a really slow box. 1 out of five tried computers/
> os’s is pretty bad result though.
>
>> On 3/25/07, Johannes wrote:
>>
>> hello again,
>> would really like to help a little bit more, but:
>> 1.) whith IR do you mean Infra-Red connection to your controller
>> (computer), or just the possibility to get Infra-Red-Informations?
> i mean to get infra red light response. some camera’s are more
> responsive in this area, some have ir blocking filters.
>> 2.) with 10 meter distance… the distance between the object and
>> the camera, or the distance between the camera and the computer?
> i really meant 10m or more, from camera to computer.
>> I didn’t try it, but with firewire you can reach up to a distance
>> of 72 meters between the camera and the computer.
> maybe with fibre optic cables or active cables, but not with the
> regular ones, i’ve even had trouble geting 8 metres out of some.
>
> thanks
>
> isjtar
>


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