/// <summary>
/// Aggregates the input features and executes the <see cref="Dtw"/> algorithm.
/// </summary>
/// <param name="signature1"></param>
/// <param name="signature2"></param>
/// <returns>Cost between <paramref name="signature1"/> and <paramref name="signature2"/></returns>
public double Pair(Signature signature1, Signature signature2)
{
Progress = 0;
Dtw dtwAlg = new Dtw(distanceMethod);
double[][] testSig1 = signature1.GetAggregateFeature(InputFeatures).ToArray();
double[][] testSig2 = signature2.GetAggregateFeature(InputFeatures).ToArray();
Progress = 50;//..
double cost = dtwAlg.Compute(testSig1, testSig2);
Log(LogLevel.Info, $"Paired SigID {signature1.ID} with SigID {signature2.ID}");
Log(LogLevel.Debug, $"Pairing result of SigID {signature1.ID} with SigID {signature2.ID}: {cost}");
Progress = 100;
return(cost);
}
public void TestComputeOneDimension()
{
double[][] signature1 = new double[3][];
//One dimension points.
signature1[0] = new double[] { 4 };
signature1[1] = new double[] { 5 };
signature1[2] = new double[] { 8 };
double[][] signature2 = new double[3][];
signature2[0] = new double[] { 4 };
signature2[1] = new double[] { 5 };
signature2[2] = new double[] { 8 };
var dtw = new Dtw();
double cost = dtw.Compute(signature1, signature2);
double expectedCost = 0;
Assert.AreEqual(expectedCost, cost);
}
public void TestComputeTwoDimension()
{
double[][] signature1 = new double[3][];
//Two dimension points. another test required for one dimension points.
signature1[0] = new double[] { 1, 4 };
signature1[1] = new double[] { 2, 5 };
signature1[2] = new double[] { 3, 8 };
double[][] signature2 = new double[3][];
signature2[0] = new double[] { 1, 5 };
signature2[1] = new double[] { 2, 6 };
signature2[2] = new double[] { 3, 8 };
var dtw = new Dtw();
double cost = dtw.Compute(signature1, signature2);
double expectedCost = 0;
Assert.AreEqual(expectedCost, cost);
}
public void TestSameInput()
{
double[][] signature1 = new double[3][];
//Two dimension points. another test required for one dimension points.
signature1[0] = new double[] { 1, 4 };
signature1[1] = new double[] { 2, 5 };
signature1[2] = new double[] { 3, 8 };
double[][] signature2 = new double[3][];
signature2[0] = new double[] { 1, 4 };
signature2[1] = new double[] { 2, 5 };
signature2[2] = new double[] { 3, 8 };
var dtw = new Dtw();
double cost = dtw.Compute(signature1, signature2);
double expectedCost = 0;
double expectedDistance = 0;
double distance = dtw.Distance(signature1[1], signature2[1]);
Assert.AreEqual(expectedDistance, distance);
Assert.AreEqual(expectedCost, cost);
}
public void TestComputeDifferentLenghtInput() //SameLengthInput already tested in the previous tests.
{
double[][] signature1 = new double[3][];
//Two dimension points. another test required for one dimension points.
signature1[0] = new double[] { 1, 4 };
signature1[1] = new double[] { 2, 5 };
signature1[2] = new double[] { 3, 8 };
double[][] signature2 = new double[4][];
signature2[0] = new double[] { 1, 6 };
signature2[1] = new double[] { 2, 7 };
signature2[2] = new double[] { 3, 10 };
signature2[3] = new double[] { 4, 12 };
var dtw = new Dtw();
double cost = dtw.Compute(signature1, signature2);
double expectedCost = 0.25;
double expectedDistance = 2;
double distance = dtw.Distance(signature1[1], signature2[1]);
Assert.AreEqual(expectedDistance, distance);
Assert.AreEqual(expectedCost, cost);
}