verificationform.vb

DigitalPersona.rar

' NOTE: This form is inherited from the CaptureForm,
' so the VisualStudio Form Designer may not load this properly
' (at least until you build the project).
' If you want to make changes in the form layout - do it in the base CaptureForm.
' All changes in the CaptureForm will be reflected in all derived forms 
' (i.e. in the EnrollmentForm and in the VerificationForm)

Public Class VerificationForm
	Inherits CaptureForm

	Private Template As DPFP.Template
	Private Verificator As DPFP.Verification.Verification

	Public Sub Verify(ByVal template As DPFP.Template)
		Me.Template = template
		ShowDialog()
	End Sub

	Protected Overrides Sub Init()
		MyBase.Init()
		MyBase.Text = "Fingerprint Verification"
		Verificator = New DPFP.Verification.Verification()
		UpdateStatus(0)
	End Sub

	Protected Overrides Sub Process(ByVal Sample As DPFP.Sample)
		MyBase.Process(Sample)

		' Process the sample and create a feature set for the enrollment purpose.
		Dim features As DPFP.FeatureSet = ExtractFeatures(Sample, DPFP.Processing.DataPurpose.Verification)

		' Check quality of the sample and start verification if it's good
		If Not features Is Nothing Then
			' Compare the feature set with our template
			Dim result As DPFP.Verification.Verification.Result = New DPFP.Verification.Verification.Result()
			Verificator.Verify(features, Template, result)
			UpdateStatus(result.FARAchieved)
			If result.Verified Then
				MakeReport("The fingerprint was VERIFIED.")
			Else
				MakeReport("The fingerprint wan NOT VERIFIED.")
			End If
		End If
	End Sub

	Protected Sub UpdateStatus(ByVal FAR As Integer)
		' Show "False accept rate" value
		SetStatus(String.Format("False Accept Rate (FAR) = {0}", FAR))
	End Sub

End Class