[PD] Fwd: Need help for motion tracking
ben at ekran.org
Wed May 24 15:45:50 CEST 2006
Usually you need to lock the iris/exposure of the camera, otherwise the
thresholds you set for movement in software become largely useless. You
may be able to set those things to a manual mode in the device
settings... Obviously you also need to have full control of the lights
so that it does not change...
Other than that HCS is right here, don't expect much.
Hans-Christoph Steiner wrote:
> On May 23, 2006, at 11:47 PM, Tomi Dufva wrote:
>>> Does anyone have good suggestions for this kind of problem:
>>> We are doing simple interactive sound installation for one gallery,
>>> where webcam is used for motion tracking and then the tracked values
>>> are being used to trigger sounds and alter them. we are using 4
>>> speakers, and alltogether playing 2stereo files at most.
>>> Problems we have:
>>> 1.a good motion tracker patch, only one we have found is the one
>>> example patch in gem. This is ok, but if anyone has better we are
>>> happy to hear about it.
> First off, motion tracking with video is limited, don't expect amazing
> results, because no one in the world is getting them. If you are
> serious about motion tracking, then you need to have a high- quality
> camera, not a webcam, they are too noisy. Also, you'll have much
> better results if you use a black&white camera with an infrared
> filter. Color cameras generally filter out infrared, so they won't work.
> These projects use this kind of camera setup:
>>> 2. playing soundfiles, we are looking for a patch to play wav or mp3
>>> or aiff files where we could change the speed, etc. easily.
>>> 3. And then we are looking some interesting things to alter the
>>> soundfiles. The soundfiles are rather long recordings of rain, so
>>> normal sample players wont work.
> My current favorite is feeding strange numbers into [fdn~] from creb.
> You can get an example patch from Day 3 - Sound:
>>> If you know some ideas we would be happy to hear about them! Thank you!
>>> ps. we are using mac mini 1,25ghz wiht 1giga of ram and running os x
>>> 10.4.6 and pd 0.39.2-extended test3
>> PD-list at iem.at mailing list
>> UNSUBSCRIBE and account-management -> http://lists.puredata.info/
> "Computer science is no more related to the computer than astronomy is
> related to the telescope."
> -Edsger Dykstra
> PD-list at iem.at mailing list
> UNSUBSCRIBE and account-management ->
More information about the Pd-list