public override void BeginTemplating(CaptureInfo capture)
{
// Prepare to start templating a new capture
// Clear the UI of any previous work
Outer.m_DispatcherHelper.Invoke(new Action(() =>
{
Outer.Minutae.Clear();
}));
// Record the new capture
Outer.Capture = capture;
if (Outer.Capture.TemplateData != null)
{
// If there is a template in the capture info, load it.
IEnumerable <MinutiaRecord> template = IsoTemplateHelper
.ToMinutae(Outer.Capture.TemplateData);
foreach (MinutiaRecord rec in template)
{
// Ensure we use the UI thread to add to the ObservableCollection.
App.Current.Dispatcher.Invoke(new Action(() =>
{
Outer.Minutae.Add(rec);
}));
}
}
TransitionTo(typeof(WaitLocation));
}
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));
}
}
