public void Match()
{
var db = Path.Combine("FVC2000", "DB1_B");
Console.WriteLine("Matching database {0}", db);
var templates = Path.Combine(TestUtils.TemplatePath, db);
var personIds = (from filename in Directory.GetFiles(templates)
select Path.GetFileNameWithoutExtension(filename).Split(new[] { '_' })[0]).Distinct().ToArray();
var fps = (from personId in personIds
select(from filename in Directory.GetFiles(templates, personId + "_*.xml")
select new FingerprintTemplate(XElement.Load(filename))).ToArray()).ToArray();
var setupTime = new TimeBenchmark();
var matchTime = new TimeBenchmark();
var nonmatchTime = new TimeBenchmark();
var matching = new List <double>();
var nonmatching = new List <double>();
foreach (var row in fps)
{
foreach (var probe in row)
{
var matcher = setupTime.Measure(() => new FingerprintMatcher(probe));
matching.AddRange(matchTime.Measure(row.Where(c => c != probe), matcher.Match));
nonmatching.AddRange(nonmatchTime.Measure(fps.Where(cr => cr != row).SelectMany(r => r), matcher.Match));
}
}
Console.WriteLine("{0:0} fp/s, {1:0.00}ms setup time, {2:0.00}ms final match time", nonmatchTime.Throughput, setupTime.UnitTime.TotalMilliseconds, matchTime.UnitTime.TotalMilliseconds);
matching.Sort();
nonmatching.Sort();
var both = matching.Concat(nonmatching).ToList();
var thresholds = (from score in both.Concat(new[] { both.Max() + 1 }).Distinct().OrderBy(s => s)
select new
{
Threshold = score,
FMR = ApplyThreshold(nonmatching, score) / (double)nonmatching.Count,
FNMR = (matching.Count - ApplyThreshold(matching, score)) / (double)matching.Count
}).ToList();
var eer = thresholds.First(t => t.FNMR >= t.FMR);
Console.WriteLine("EER {0:0.00%} @ threshold {1:0.0}", (eer.FMR + eer.FNMR) / 2, eer.Threshold);
var fmr1k = thresholds.First(t => t.FMR <= 0.001);
Console.WriteLine("FMR1000 {0:0.00%} @ threshold {1:0.0}", fmr1k.FNMR, fmr1k.Threshold);
var fmr10k = thresholds.First(t => t.FMR <= 0.0001);
Console.WriteLine("FMR10000 {0:0.00%} @ threshold {1:0.0}", fmr10k.FNMR, fmr10k.Threshold);
}