public static ScalarAccuracy Of(SampleDataset dataset)
{
return(PersistentCache.Get("accuracy", dataset.Path, () =>
{
var trio = QuantileFunction.Of(dataset);
var accuracy = new ScalarAccuracy();
accuracy.Fmr100 = QuantileFunction.FnmrAtFmr(trio.Matching, trio.Nonmatching, 1.0 / 100);
accuracy.Fmr1K = QuantileFunction.FnmrAtFmr(trio.Matching, trio.Nonmatching, 1.0 / 1_000);
accuracy.Fmr10K = QuantileFunction.FnmrAtFmr(trio.Matching, trio.Nonmatching, 1.0 / 10_000);
accuracy.Eer = QuantileFunction.Eer(trio.Matching, trio.Nonmatching);
return accuracy;
}));
}
public static double[][] Of(SampleDataset dataset)
{
return(PersistentCache.Get("scores", dataset.Path, () =>
{
var fingerprints = dataset.Fingerprints;
var templates = fingerprints.Select(fp => NativeTemplate.Of(fp)).ToList();
var scores = new double[fingerprints.Count][];
foreach (var probe in fingerprints)
{
var matcher = new FingerprintMatcher(templates[probe.Id]);
scores[probe.Id] = new double[fingerprints.Count];
foreach (var candidate in fingerprints)
{
scores[probe.Id][candidate.Id] = matcher.Match(templates[candidate.Id]);
}
}
return scores;
}));
}
public static Trio Of(SampleDataset dataset)
{
var fingerprints = dataset.Fingerprints;
var scores = ScoreTable.Of(dataset);
var matching = new List <double>();
var nonmatching = new List <double>();
var selfmatching = new List <double>();
foreach (var probe in fingerprints)
{
foreach (var candidate in fingerprints)
{
var score = scores[probe.Id][candidate.Id];
if (probe.Id == candidate.Id)
{
selfmatching.Add(score);
}
else if (probe.Finger.Id == candidate.Finger.Id)
{
matching.Add(score);
}
else
{
nonmatching.Add(score);
}
}
}
matching.Sort();
nonmatching.Sort();
selfmatching.Sort();
var trio = new Trio();
trio.Matching = matching.ToArray();
trio.Nonmatching = nonmatching.ToArray();
trio.Selfmatching = selfmatching.ToArray();
return(trio);
}
public SampleFingerprint(SampleDataset dataset, int id)
{
Dataset = dataset;
Id = id;
}
public static Table ExtractorTable(SampleDataset dataset)
{
return(SumTables(dataset.Fingerprints.Select(fp => ExtractorTable(fp)).ToList()));
}
