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Filtering accelerometer data noise

Asked 2009-10-28T17:39:21.737
26

How do I filter noise of the accelerometer data in Android? I would like to create a high-pass filter for my sample data so that I could eliminate low frequency components and focus on the high frequency components. I have read that Kalman filter might be the best candidate for this, but how do I integrate or use this method in my application which will mostly written in Android Java? or can it be done in the first place? or through Android NDK? Is there by any chance that this can be done in real-time?

Any idea will be much appreciated. Thank you!

android accelerometer
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For those wondering what norm() and clamp() methods do in the answer from rbgrn, you can see them here: http://developer.apple.com/library/IOS/samplecode/AccelerometerGraph/Listings/AccelerometerGraph_AccelerometerFilter_m.html

double norm(double x, double y, double z)
{
    return Math.sqrt(x * x + y * y + z * z);
}

double clamp(double v, double min, double max)
{
    if(v > max)
        return max;
    else if(v < min)
        return min;
    else
        return v;
}
answered 2012-05-25T02:57:22.633

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