Hi Popesz, At least on kinect, there's always a bit of noise in the tracking. The change from frame-to-frame will never be exactly 0, so you need something that acts more like a threshold.
One place to start would be collecting some data on the amplitude of the noise when you're doing what you'd consider standing still. For one dimensional data, you just want to see how big is the typical value of |x(n)-x(n-1)|. For more dimensions, you need sqrt sum of squares on the differences Then, I'd probably give it a exponential decay weighting and compare against a threshold that is just some factor larger than the basic noise amplitude. 1-D: [r coordinate] | [t f f] X [- 0] | [r fb] | [* 0.9] or some other factor <1 [+ 0] |\ | [s fb] | [expr $f1 < 10] | [select 0 1] My kinect data is all over the place. The device is really sensitive to lighting, background detail, and so on. You should consider that the noise may be larger sometimes depending on where you're using the sensor. Chuck On Sat, Feb 1, 2020 at 2:58 PM Csaba Láng <[email protected]> wrote: > > Dearest list, > > is there any object which only gives me a value from a constantly changing > random numbers when it stops for a while, let's say for one second or so? > I am looking for the parameters of tracking hands from Kinect like motion > detector when the hands stops on an object for a while. > > Best, > > Popesz > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
