Pengenalan Tulisan Tangan
Bagian ini membahas dasar-dasar pengakuan karena berkaitan dengan tinta digital di platform WPF.
Solusi Pengenalan
Contoh berikut menunjukkan cara mengenali tinta menggunakan kelas Microsoft.Ink.InkCollector .
Catatan
Sampel ini mengharuskan pengenal tulisan tangan diinstal pada sistem.
Buat proyek aplikasi WPF baru di Visual Studio yang disebut InkRecognition. Ganti konten file Window1.xaml dengan kode XAML berikut. Kode ini merender antarmuka pengguna aplikasi.
<Window x:Class="InkRecognition.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://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>
<Button x:Name="btnClear" Content="Clear Canvas" Canvas.Left="10" Canvas.Top="367" Width="75" Click="btnClear_Click"/>
</Canvas>
</Window>
Tambahkan referensi ke rakitan Microsoft Ink, Microsoft.Ink.dll, yang dapat ditemukan di \Program Files\Common Files\Microsoft Shared\Ink. Ganti konten kode di belakang file dengan kode berikut.
using System.Windows;
using Microsoft.Ink;
using System.IO;
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)
{
using (MemoryStream ms = new MemoryStream())
{
theInkCanvas.Strokes.Save(ms);
var myInkCollector = new InkCollector();
var ink = new Ink();
ink.Load(ms.ToArray());
using (RecognizerContext context = new RecognizerContext())
{
if (ink.Strokes.Count > 0)
{
context.Strokes = ink.Strokes;
RecognitionStatus status;
var result = context.Recognize(out status);
if (status == RecognitionStatus.NoError)
textBox1.Text = result.TopString;
else
MessageBox.Show("Recognition failed");
}
else
{
MessageBox.Show("No stroke detected");
}
}
}
}
private void btnClear_Click(object sender, RoutedEventArgs e) {
theInkCanvas.Strokes.Clear();
}
}
}
Imports System.Windows
Imports Microsoft.Ink
Imports System.IO
'/ <summary>
'/ Interaction logic for Window1.xaml
'/ </summary>
Namespace InkRecognition
Class Window1
Inherits Window
Public Sub New()
InitializeComponent()
End Sub
' Recognizes handwriting by using RecognizerContext
Private Sub buttonClick(ByVal sender As Object, ByVal e As RoutedEventArgs)
Using ms As New MemoryStream()
theInkCanvas.Strokes.Save(ms)
Dim myInkCollector As InkCollector = New InkCollector()
Dim ink As Ink = New Ink()
ink.Load(ms.ToArray())
Using context As New RecognizerContext()
If ink.Strokes.Count > 0 Then
context.Strokes = ink.Strokes
Dim status As RecognitionStatus
Dim result As RecognitionResult = context.Recognize(status)
If status = RecognitionStatus.NoError Then
textBox1.Text = result.TopString
Else
MessageBox.Show("Recognition failed")
End If
Else
MessageBox.Show("No stroke detected")
End If
End Using
End Using
End Sub
Private Sub btnClear_Click(sender As Object, e As RoutedEventArgs)
theInkCanvas.Strokes.Clear()
End Sub
End Class
End Namespace
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