diva.sketch.features

Class SumOfSquaredAnglesFE

java.lang.Object

diva.sketch.features.SumOfSquaredAnglesFE

All Implemented Interfaces:

FeatureExtractor

public class SumOfSquaredAnglesFE
extends Object
implements FeatureExtractor

SumOfSquaredAnglesFE computes the sum of squared angle values along a stroke path. This is done by calculating the angles formed by every three consecutive points in the path, squaring and summing them up. One of Rubine's features.

Version:

$Revision: 1.9 $

Author:

Heloise Hse (hwawen@eecs.berkeley.edu)

Constructor Summary

Constructors

Constructor and Description
SumOfSquaredAnglesFE()

Method Summary

Modifier and Type	Method and Description
double	apply(TimedStroke s) Compute the sum of the squared angle values along the stroke path.
String	getName() Return the name of this feature extractor.
static double	sumOfSquaredAngles(TimedStroke s) Compute the sum of the squared angle values along the stroke path.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SumOfSquaredAnglesFE

public SumOfSquaredAnglesFE()

Method Detail

apply

public double apply(TimedStroke s)

Compute the sum of the squared angle values along the stroke path. This is done by calculating the angles formed by every three consecutive points in the path, squaring and summing them up. Return -1 is there are less than 3 points.

Specified by:

apply in interface FeatureExtractor

getName

public String getName()

Return the name of this feature extractor.

Specified by:

getName in interface FeatureExtractor

sumOfSquaredAngles

public static double sumOfSquaredAngles(TimedStroke s)

Compute the sum of the squared angle values along the stroke path. This is done by calculating the angles formed by every three consecutive points in the path, squaring and summing them up. Return -1 is there are less than 3 points.