[PD] Body tracking

[Max]

there is an interesting whitepaper on this topic:
http://www.palindrome.de/d2/C13.pdf


Am 09.01.2011 um 01:37 schrieb cyrille henry:

> 
> 
> Le 08/01/2011 20:24, Pedro Lopes a écrit :
>> Not defending anything, but just to remind 60 fps of a pointgrey camera is not slow.
> for gesture, i consider everything under 200Hz as slow.
> including the wiimote 100Hz.
> 
> by example, things like this have to be done at 1000Hz:
> http://vimeo.com/9598075
> (we tried with slower system but it was not possible to be accurate enough).
> 
> 
>> you probably will have a lot of trouble in dealing with 60 frames trying to cycle through your code every second.
> you have problem analysing the image, but dealing with the data is no problem.
> 
>> Accels and other hardware sensors are very useful too, and it very good results.
> yep
>> But not the best for 3d positioning of a point in space,
> they will not provide any information regarding 3d positioning.
> 
> 
> the question is what information do you really want...
> if you want the position of someone in space, then you have to use a camera. but you can also track he's movement with a wacom.
> if you want to track it's gesture, then you need something faster. faster than a camera.
> 
> 
>> but excellent at giving the rotation of that point in space (i.e.: accels, gyros).
> yep.
> 
> cyrille
> 
>> 
>> :)
>> 
>> On Sat, Jan 8, 2011 at 7:21 PM, marcello <wallacechemical at gmail.com <mailto:wallacechemical at gmail.com>> wrote:
>> 
>>    On 08/01/11 14:25, cyrille henry wrote:
>>     > hello,
>>     >
>>     > for the kung fu : movement are usually very fast. a camera is usually to
>>     > slow to be useful.
>>     >
>>     > i personally prefer using sensor like accelerometter on the body.
>>     > you can use wiimote or some other (faster) sensors system.
>>     >
>>     > here is a video of a performance i worked for few years ago.
>>     > http://vimeo.com/4596629
>>     > sensors are used at time : 4'57 to 6'06 and from 6'43 to 7'23.
>>     >
>>     > at 6'43, you can see that this kind of sensors are lot's more accurate
>>     > that what you'll be able to do with a camera.
>> 
>>    That's a good point about the sensors, I didn't know this camera-latency
>>    problem.
>>    WHat kind of sensor have you used in your work ?
>>    Have you used wireless sensors ?
>> 
>>     > imo, camera are good to track body position.
>>     > kinect look to have a sensing zone that is a bit limited.
>> 
>>    A combination of the two could be an idea, but then it's complicated to
>>    merge the data...
>> 
>>    Thanks for the infos
>> 
>> 
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>> 
>> 
>> 
>> --
>> Pedro Lopes (MSc)
>> contact: pedro.lopes at ist.utl.pt <mailto:pedro.lopes at ist.utl.pt>
>> website: http://web.ist.utl.pt/Pedro.Lopes
>> 
>> 
>> 
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