private void TestToIsoTemplate(IEnumerable <MinutiaRecord> minutae, string isoTemplateHex)
{
// Get the IsoTemplate
byte[] template = IsoTemplateHelper.ToIsoTemplate(minutae);
// Convert the IsoTemplate back to a list of minutia (loss of data in casting)
IEnumerable <MinutiaRecord> convert_minutae = IsoTemplateHelper.ToMinutae(template);
// Convert it to Hex for comparison
string templateHex = BitConverter.ToString(template);
templateHex = templateHex.Replace("-", String.Empty);
// Assertions
CollectionAssert.AreEqual(IsoTemplateHelper.ToByteArray(isoTemplateHex), template);
Assert.AreEqual(minutae.Count(), convert_minutae.Count());
for (int i = 0; i < convert_minutae.Count(); i++)
{
MinutiaRecord real_minutia = minutae.ElementAt(i);
MinutiaRecord converted_minutia = convert_minutae.ElementAt(i);
Assert.AreEqual((int)real_minutia.Position.X, converted_minutia.Position.X);
Assert.AreEqual((int)real_minutia.Position.Y, converted_minutia.Position.Y);
// y(x,a) = ax - floor(ax)
// max(y(x,a)) = 1, min(y(x,a)) = 0
// e(x,a) = x - x_hat = 1/a * floor(ax) = 1/a * y(x,a)
// Thus max(e(x,a)) = 1/a, min(e(x,a)) = 0
Assert.IsTrue(real_minutia.Angle - converted_minutia.Angle < 1.0 / (256 / 360));
}
}
public override void OnEnteringState()
{
base.OnEnteringState();
Outer.OnUserActionRequired(new UserActionRequiredEventArgs(SET_ANGLE_PROMPT));
// Get the minutia that was placed in the previous step
IntegrityCheck.AreNotEqual(0, Outer.Minutae.Count());
m_Record = Outer.Minutae.Last();
IntegrityCheck.IsNotNull(m_Record.Position);
}
public static IEnumerable <MinutiaRecord> ToMinutae(byte[] isoTemplate)
{
IntegrityCheck.IsNotNull(isoTemplate);
// TODO: IntegrityCheck start is HEADER_TOP
// TODO: IntegrityCheck HEADER_BOTTOM
int headerTopCount = ToByteArray(HEADER_TOP).Count(); // TODO: Make constant
int minutiaCount_1 = ToMinutiaCount(isoTemplate[headerTopCount]);
int headerBottomCount = ToByteArray(HEADER_BOTTOM).Count(); // TODO: Make constant
int minutiaCount_2 = (UInt16)isoTemplate[headerTopCount + 1 + headerBottomCount];
// TODO: IntegrityCheck minutiaCount_1 == minutiaCount_2
int minutiaCount = minutiaCount_1;
int startByte = headerTopCount + 1 + headerBottomCount + 1; // TODO: Make constant
int bytesPerMinutia = 6; // TODO: Make constant
List <MinutiaRecord> minutae = new List <MinutiaRecord>(minutiaCount);
for (int i = 0; i < minutiaCount; i++)
{
MinutiaType type = TypeToMinutiaType(isoTemplate[startByte]);
// TODO: IntegrityCheck type != None
// Get Minutia X-Position
int x = (UInt16)isoTemplate[startByte + 1];
// Get Minutia Y-Position
byte[] yData = new byte[2];
Array.Copy(isoTemplate, startByte + 2, yData, 0, 2);
int y = YToInt(yData);
// Get Minutia angle from the two angle bytes.
double angle = AngleToDouble(isoTemplate[startByte + 4]);
// TODO: IntegrityCheck quality
// Create minutia from data and add to list.
MinutiaRecord minutia = new MinutiaRecord(
new System.Windows.Point(x, y),
angle,
type);
minutae.Add(minutia);
startByte += bytesPerMinutia;
}
// TODO: More assertions
return(minutae);
}
public override void PositionInput(Point position)
{
// The user is starting to record a new minutia
// Start a new minutia data record.
MinutiaRecord record = new MinutiaRecord();
// Save the position
record.Position = position;
// Save the current type.
record.Type = Outer.InputMinutiaType;
// Record minutia information.
Outer.Minutae.Add(record);
// Indicate next input defines the direction.
TransitionTo(typeof(WaitDirection));
}
private static string ToRecord(MinutiaRecord labels)
{
return(String.Format("{0}, {1}, {2}, {3}",
labels.Position.X, labels.Position.Y, labels.Angle, labels.Type));
}
