Handwriting Recognition
This section discusses the fundamentals of recognition as it pertains to digital ink in the WPF platform.
Recognition Solutions
The following example shows how to recognize ink using the InkAnalyzer.
Note
This sample requires that handwriting recognizers be installed on the system.
Create a new WPF application project in Visual Studio 2005 called InkRecognition. Replace the contents of the Window1.xaml file with the following XAML code. This code renders the application's user interface.
<Window x:Class="InkRecognition.Window1"
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Title="InkRecognition"
>
<Canvas Name="theRootCanvas">
<Border
Background="White"
BorderBrush="Black"
BorderThickness="2"
Height="300"
Width="300"
Canvas.Top="10"
Canvas.Left="10">
<InkCanvas Name="theInkCanvas"></InkCanvas>
</Border>
<TextBox Name="textBox1"
Height="25"
Width="225"
Canvas.Top="325"
Canvas.Left="10"></TextBox>
<Button
Height="25"
Width="75"
Canvas.Top="325"
Canvas.Left="235"
Click="buttonClick">Recognize</Button>
</Canvas>
</Window>
Add a reference to the WPF Ink Analysis assemblies, IAWinFX.dll, IACore.dll, and IALoader.dll, which can be found in \Program Files\Reference Assemblies\Microsoft\Tablet PC\v1.7. Replace the contents of the code behind file with the following code.
Imports System.Windows
Imports System.Windows.Ink
'/ <summary>
'/ Interaction logic for Window1.xaml
'/ </summary>
Namespace InkRecognition
Class Window1
Inherits Window
Public Sub New()
InitializeComponent()
End Sub 'New
' Recognizes handwriting by using RecognizerContext
Private Sub buttonClick(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim theInkAnalyzer As New InkAnalyzer()
theInkAnalyzer.AddStrokes(theInkCanvas.Strokes)
Dim status As AnalysisStatus = theInkAnalyzer.Analyze()
If status.Successful Then
textBox1.Text = theInkAnalyzer.GetRecognizedString()
Else
MessageBox.Show("Recognition Failed")
End If
End Sub 'buttonClick
End Class 'Window1
End Namespace
using System.Windows;
using System.Windows.Ink;
namespace InkRecognition
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
// Recognizes handwriting by using RecognizerContext
private void buttonClick(object sender, RoutedEventArgs e)
{
InkAnalyzer theInkAnalyzer = new InkAnalyzer();
theInkAnalyzer.AddStrokes(theInkCanvas.Strokes);
AnalysisStatus status = theInkAnalyzer.Analyze();
if (status.Successful)
{
textBox1.Text = theInkAnalyzer.GetRecognizedString();
}
else
{
MessageBox.Show("Recognition Failed");
}
}
}
}