WTProcessor class

Processor class for Walking Test (WT) data analysis.

Implements step detection algorithms for walking tests using accelerometer data. The processor analyzes sensor data to count steps and calculate walking metrics such as time for a specific number of steps or step cadence.

Used by WtTestStep for post-processing sensor data after test completion. The algorithm is optimized for chest-mounted sensors and uses:

  • Y-axis accelerometer data with gravity removal
  • Low-pass filtering to reduce noise
  • Peak detection with configurable thresholds
  • Step timing validation to prevent false positives

Returns a WTResult containing walking performance metrics.

Inheritance

Constructors

WTProcessor.new({required WTConfig config, required WTMeasure measure})

Properties

config → WTConfig
Configuration settings for the walking test
final
hashCode → int
The hash code for this object.
no setterinherited
measure → WTMeasure
Measure definition containing test parameters
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

decimateData<T>(List<T> input, double targetRate, double actualRate) → List<T>
Decimates input data by reducing the sampling rate.
detectSteps({required List<double> acc, required double threshold, int smoothingWindow = 10, int minStepIntervalMs = 300}) → List<Step>
Detects individual steps in accelerometer data using peak detection.
getStepCount({required List<SensorEvent> accData, required double accActualRate}) → int
Counts the total number of steps detected in accelerometer data.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
processData({required List<SensorEvent> accData, required List<SensorEvent> gyroData, required List<SensorEvent> magData, required double accActualRate, required double gyroActualRate, required double magActualRate}) → Future<List<WTResult>>
Processes raw sensor data and returns a list of WTResults.
override
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited