/// <summary>
/// Steps through all available temmplates and match fingerprint templates
/// </summary>
/// <param name="comparer">Delegate function that does the actual matching in the context desgnated by a particular finger</param>
/// <param name="matchAny">If true any one finger match is sufficient for matching, if false all fingers must match</param>
/// <param name="fingerContexts">List of matching contexts indexed by finger</param>
/// <param name="matchFingers">Flags of fingers available for matching</param>
/// <returns></returns>
public object Identify(CompareFingerDelegate comparer, bool matchAny, Dictionary <Fingers, int> fingerContexts, Fingers matchFingers)
{
if (Connection != null && Connection.State == ConnectionState.Open)
{
using (IDataReader rdr = InternalGetTemplates()) //Reader must be sorted by individual
{
Fingers matchedFingers = 0; //fingers that have been matched
FingerprintTemplate template;
Fingers finger;
while (rdr.Read())
{
ReadTemplate(rdr, out finger, out template);
if ((matchFingers & finger) != 0)
{
if (comparer(fingerContexts[finger], template))
{
matchedFingers |= finger;
}
}
if ((matchAny & ((matchFingers & matchedFingers) != 0)) | (matchFingers == matchedFingers)) //individual matched
{
return(rdr[IndividualFieldName]);
}
} //while
return(null); //No match found
}
}
else
{
throw new FPLibraryException(FPLibraryException.LibraryDalError, "Connection is null or closed");
}
}
/// <summary>
/// Fingerprints are obtained, first tested if they exist in the database, and if not then saved to the database
/// The individual to which the captured fingerprints must be saved must be set as the ActiveIndividual in the DataAccesLayer
/// </summary>
/// <param name="sensor">The sensor to capture the finger print from</param>
/// <returns>The individual ID of the individual identified, null if none was identified</returns>
public object IdentifyAndCapture(string sensor)
{
try
{
object result = null;
griauleLibrary.SetIdentifyParameters(IdentificationThreshold, IdentificationRotationTolerance);
Dictionary <Fingers, FingerprintTemplate> capturedFingers = Capture(sensor, DataAccessLayer.ActiveIndividual != null);
if (capturedFingers != null && capturedFingers.Count > 0)
{
//Set up and prepare an identification context for each captured finger
Dictionary <Fingers, int> fingerContexts = new Dictionary <Fingers, int>(capturedFingers.Count);
Fingers matchFingers = 0; //Fingers to match
try
{
foreach (var kvp in capturedFingers)
{
int context;
griauleLibrary.CreateContext(out context);
fingerContexts.Add(kvp.Key, context);
griauleLibrary.IdentifyPrepare(capturedFingers[kvp.Key], context);
matchFingers |= kvp.Key; //add finger to fingers to be matched
}
CompareFingerDelegate comparer = CompareTemplate;
result = DataAccessLayer.Identify(CompareTemplate, true, fingerContexts, matchFingers);
if (result == null) //No one identified
{
foreach (var kvp in capturedFingers)
{
DataAccessLayer.SaveTemplate(kvp.Key, kvp.Value);
}
}
}
finally
{
foreach (var kvp in fingerContexts)
{
griauleLibrary.DestroyContext(kvp.Value);
}
}
}
return(result);
}
catch (FingerprintException ex)
{
MessageBox.Show(String.Format("Identification Error : {0} {1}", ex.ErrorCode, ex.Message), "FPLibrary Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(null);
}
catch (Exception e)
{
MessageBox.Show(String.Format("Identification Error : {0}", e.Message), "FPLibrary Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(null);
}
}
/// <summary>
/// Steps through all available temmplates and match fingerprint templates
/// </summary>
/// <param name="comparer">Delegate function that does the actual matching in the context desgnated by a particular finger</param>
/// <param name="matchAny">If true any one finger match is sufficient for matching, if false all fingers must match</param>
/// <param name="fingerContexts">List of matching contexts indexed by finger</param>
/// <param name="matchFingers">Flags of fingers available for matching</param>
/// <returns></returns>
public object Identify(CompareFingerDelegate comparer, bool matchAny, Dictionary<Fingers, int> fingerContexts, Fingers matchFingers)
{
if (Connection != null && Connection.State == ConnectionState.Open)
{
using (IDataReader rdr = InternalGetTemplates()) //Reader must be sorted by individual
{
Fingers matchedFingers = 0; //fingers that have been matched
FingerprintTemplate template;
Fingers finger;
while (rdr.Read())
{
ReadTemplate(rdr, out finger, out template);
if ((matchFingers & finger) != 0)
{
if (comparer(fingerContexts[finger], template))
matchedFingers |= finger;
}
if ((matchAny & ((matchFingers & matchedFingers) != 0)) | (matchFingers == matchedFingers)) //individual matched
return rdr[IndividualFieldName];
} //while
return null; //No match found
}
}
else
{
throw new FPLibraryException(FPLibraryException.LibraryDalError, "Connection is null or closed");
}
}
