public override double Train(List <Signature> signatures)
{
if (signatures == null)
{
throw new ArgumentNullException(nameof(signatures));
}
if (signatures.Count == 0)
{
throw new ArgumentException("'sigantures' can not be empty", nameof(signatures));
}
originals = signatures;
List <double> costs = new List <double>(originals.Count);
double avg = 0;
double max = -1;
int n = 0;
List <object[]> debugInfo = new List <object[]>();
//object[,] debugInfo = new object[originals.Count+1, originals.Count+1];
var debugRow = new object[signatures.Count + 1];
for (int i = 0; i < originals.Count; i++)
{
debugRow[i + 1] = signatures[i].ID;
}
debugInfo.Add(debugRow);
for (int i = 0; i < originals.Count - 1; i++)
{
debugRow = new object[signatures.Count + 1];
debugRow[0] = signatures[i].ID;
for (int j = i + 1; j < originals.Count; j++)
{
//double cost = new Dtw(originals[i], originals[j], InputFeatures).CalculateDtwScore();
double cost = DtwHelper.GetCost(originals[i], originals[j], DtwType, InputFeatures);
debugRow[j + 1] = cost;
avg += cost;
costs.Add(cost);
if (cost > max)
{
max = cost;
}
n++;
}
debugInfo.Add(debugRow);
}
avg /= n;
double dev = Measures.StandardDeviation(costs.ToArray(), false);
threshold = avg + 0.8 * dev; // + Math.Abs(avg - max) / 2 ; //TODO: rendesen beállítani, valami adaptívabbat kitaláltni
Logger.Info(this, signatures[0].Signer.ID + "-dtwclassifier-distances", debugInfo);
return(threshold);
}
public override double Test(Signature signature)
{
var debugInfo = (List <object[]>)Logger.ObjectEntries[signature.Signer.ID + "-dtwclassifier-distances"];
var debugRow = new object[originals.Count + 1];
debugRow[0] = signature.ID;
double avgDist = 0;
foreach (var original in originals)
{
//var dist = new Dtw(original, signature, InputFeatures).CalculateDtwScore();
var dist = DtwHelper.GetCost(original, signature, DtwType, InputFeatures);
avgDist += dist;
debugRow[originals.IndexOf(original) + 1] = dist;
}
debugInfo.Add(debugRow);
avgDist /= originals.Count;
return(CalculateTestResult(avgDist, threshold));
}
private double GetAvgDistFromReferences(Signature sig)
{
double avgDist = 0;
int count = referenceSignatures.Count;
foreach (var refSig in referenceSignatures)
{
if (sig == refSig)
{
count--;
}
else
{
//var dist = new Dtw(sig, refSig, InputFeatures).CalculateDtwScore();
var dist = DtwHelper.GetCost(sig, refSig, DtwType, InputFeatures);
avgDist += dist;
debugInfo[trainSignatures.IndexOf(sig) + 1, referenceSignatures.IndexOf(refSig) + 1] = dist;
}
}
avgDist /= count;
return(avgDist);
}
