RFE: Kinect CHOP Documentation...

[rodberry]

The Kinect CHOP help page needs filling in what the other parameters do.
well, can guess but it would be nice to have it there.

derivative.ca/wiki077/index. … inect_CHOP

I googled a bit and found the following from here:

   [msdn.microsoft.com/en-us/library/jj131024.aspx](http://msdn.microsoft.com/en-us/library/jj131024.aspx)

Joint Filtering

The skeletal tracking joint information can be adjusted (smoothed) across different frame to minimize jittering and stabilize the joints position over time, like for example to drive a cursor icon on the screen using the position of the hand joint.

The Kinect for Windows SDK provides a mechanism to smooth the joints position in a frame. Applications can enable smoothing and Kinect will adjust the position of the joints calculated in that frame according to the desired smoothing behavior.

The smoothing filter used is based on the Holt Double Exponential Smoothing method used for statistical analysis of economic data. This provides smoothing with less latency than other smoothing filter algorithms. The filter can be controlled via five smoothing parameters:

Smoothing
    Smoothing parameter. Increasing the smoothing parameter value leads to more highly-smoothed skeleton position values being returned.
    It is the nature of smoothing that, as the smoothing value is increased, responsiveness to the raw data decreases.
    Thus, increased smoothing leads to increased latency in the returned skeleton values.
    Values must be in the range 0 through 1.0. Passing 0 causes the raw data to be returned.
Correction
    Correction parameter. Lower values are slower to correct towards the raw data, and appear smoother, while higher values will correct toward the raw data more quickly.
    Values must be in the range 0 through 1.0.
Prediction
    The number of frames to predict into the future.
    Values must be greater than or equal to zero.
    Values greater than 0.5 will likely lead to overshooting when moving quickly. This effect can be damped by using small values of fMaxDeviationRadius.
JitterRadius
    o The radius in meters for jitter reduction.
    Any jitter beyond this radius is clamped to the radius.
MaxDeviationRadius
    The maximum radius in meters that filtered positions are allowed to deviate from raw data.
    Filtered values that would be more than this radius from the raw data are clamped at this distance, in the direction of the filtered value.

rod