public bool CheckSignature([FromBody] SignatureDTO aSig)
{
SignatureData lSignatureData = SignatureUtils.SignatureUtils.GetSignatureFromBase64String(aSig.Signature, aSig.Email);
Signature lSigWithCharacteristics = SignatureUtils.SignatureUtils.CalculateCharacteristics(lSignatureData.Signature);
lSigWithCharacteristics = SignatureUtils.SignatureUtils.StandardizeSignature(lSigWithCharacteristics);
var lDirectory = "d:\\Signatures\\" + lSignatureData.Email + "\\";
//Get all signatures from folder. True flag indicates, that all characteristics we are working with are stored in the file, these will be loaded too
List <Signature> lSignatures = SignatureFileUtils.GetAllSignaturesFromFolder(lDirectory, true);
DTWConfiguration lDTWConfig = new DTWConfiguration()
.UseXY()
.UseX1Y1()
.UseX2Y2()
.UseForce()
.UseForce1()
.UsePathVelocity();
//Check for NaN values at Force and Force1 characrteristics.
SignatureUtils.SignatureUtils.CheckForNaN(lSigWithCharacteristics, ref lDTWConfig);
return(SignatureQualityEvaluation.Authenticate(lDirectory, lSigWithCharacteristics, lDTWConfig, 0.05));
}
public int SaveSignature([FromBody] SignatureDTO aSig)
{
//Get signature from the Base64Encoded string
SignatureData lSignatureData = SignatureUtils.SignatureUtils.GetSignatureFromBase64String(aSig.Signature, aSig.Email);
var lDirectory = "d:\\Signatures\\" + lSignatureData.Email + "\\";
if (!System.IO.Directory.Exists(lDirectory))
{
System.IO.Directory.CreateDirectory(lDirectory);
}
var fileName = lDirectory + DateTime.Now.Ticks.ToString() + ".csv";
var lFeaturesFileName = lDirectory + "\\SignatureFeatures\\" + "SignatureFeatures.csv";
//Calculate characteristics of the received signature and standardize it
Signature lSigWithCharacteristics = SignatureUtils.SignatureUtils.CalculateCharacteristics(lSignatureData.Signature);
lSigWithCharacteristics = SignatureUtils.SignatureUtils.StandardizeSignature(lSigWithCharacteristics);
//Create DTW configuration for the quality evaluation
DTWConfiguration lDTWConfig = new DTWConfiguration()
.UseXY()
.UseX1Y1();
//Check the quality of the signature. If it is a poor quality signature, request it once again
bool lResult = SignatureQualityEvaluation.CheckQuality(lDirectory, lSigWithCharacteristics, lDTWConfig);
if (lResult)
{
//Save function based data to csv file
SignatureFileUtils.SaveSignatureWithCharacteristicsToFile(lSigWithCharacteristics, fileName);
try
{
//Save feature based data to csv file
SignatureFeatures lFEatures = FeatureCalculator.CalculateFeatures(lSigWithCharacteristics);
if (!System.IO.Directory.Exists(lDirectory + "\\SignatureFeatures\\"))
{
System.IO.Directory.CreateDirectory(lDirectory + "\\SignatureFeatures\\");
}
SignatureFileUtils.SaveFeatureSetToFile(lFEatures, lFeaturesFileName);
}
catch (Exception ex)
{
//If an error occurs, do nothing
//An error can occur in case of the pressure related features, beacause some devices don't return the pressure value
}
return(1);
}
else
{
return(0);
}
}
