[PD] Body tracking

[Jose Luis Santorcuato]

Hi, As Cyrille says a good choice is the wii and its accelerometer,
you can even hack and reduce weight and dimensions, the three-axis
accelerometer or sensor flex not recommend to you, take away the
freedom to be wired.

I heard that the camera play 3 works very well for tracking, even I
could prove it.
Maybe if you dont want hardware, it would be Gesture Processing
library in connection with Pd via OSC.

That library can keep track and memorize your gesture …

There is something similar in pd?

Best regards

José

2011/1/8 Max <abonnements at revolwear.com>:
> 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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