org.android.activityminer.logic.filter
Interface LowPassFilter

All Known Implementing Classes:

AdaptiveLowPassFilter, ButterworthLowPassFilter, NullFilter

public interface LowPassFilter

Interface for low pass filters.

Method Summary

void	apply(List<Double> x, List<Double> y, List<Double> z, List<Long> ts) Does apply this filter to an accelerometer time series stream.
double[]	lowPass(double[] x, double[] y, long currentTs) The filter function.
void	reset() Does reset the filter
void	setCutOffFrequency(double cf) Setter for the cut-off frequency
void	updateConfiguration(RuntimeConfiguration config) Does update the filter settings by the given configuration.

Method Detail

lowPass

double[] lowPass(double[] x,
                 double[] y,
                 long currentTs)

The filter function.

Parameters:

x - the actual input signal

y - the last output signal

currentTs - the current time stamp

Returns:

the current output signal

apply

void apply(List<Double> x,
           List<Double> y,
           List<Double> z,
           List<Long> ts)

Does apply this filter to an accelerometer time series stream.

Parameters:

x - the x axis signal stream

y - the y axis signal stream

z - the z axis signal stream

ts - the time stamps

updateConfiguration

void updateConfiguration(RuntimeConfiguration config)

Does update the filter settings by the given configuration.

Parameters:

config - the configuration to update from.

reset

void reset()

Does reset the filter

setCutOffFrequency

void setCutOffFrequency(double cf)

Setter for the cut-off frequency

Parameters:

cf - the cut-off frequencyy