C# OCR實現文字識別功能

<Window x:Class="PaddleOCRWPF.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="OCR離線版" Height="450" Width="900" WindowStartupLocation="CenterScreen">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="0.5*"/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <GroupBox Grid.Column="0" Header="預覽" Margin="10,10,5,10">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="1*"/>
                </Grid.RowDefinitions>
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="0,5">
                    <Button x:Name="BtnOCR" Content="開啟圖片" Height="30" Width="120" Margin="0,0,10,0" Click="BtnOCR_Click"/>
                    <Button x:Name="BtnClose" Content="清除" Height="30" Width="120" Click="BtnClose_Click"/>
                </StackPanel>
                <Image Name="ImgPreview" Grid.Row="1" Margin="5"/>
            </Grid>
        </GroupBox>
        <GroupBox Grid.Column="1" Header="識別結果" Margin="5,10,10,10">
            <TextBox x:Name="TxtPreview" TextWrapping="Wrap" BorderThickness="0" IsReadOnly="True"/>
        </GroupBox>
    </Grid>
</Window>

using Microsoft.Win32;
using PaddleOCRSharp;
using System;
using System.Drawing;
using System.IO;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media.Imaging;

namespace PaddleOCRWPF
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void BtnOCR_Click(object sender, RoutedEventArgs e)
        {
            StartDistinguish();
        }

        private void BtnClose_Click(object sender, RoutedEventArgs e)
        {
            ImgPreview.Source = null;
            TxtPreview.Text = "";
        }

        /// <summary>
        /// 呼叫核心
        /// </summary>
        private void StartDistinguish()
        {
            OpenFileDialog openFile = new()
            {
                Filter = "圖片(*.bmp;*.jpg;*.jpeg;*.png)|*.bmp;*.jpg;*.jpeg;*.png"
            };

            if (!(bool)openFile.ShowDialog()) return;

            Dispatcher.BeginInvoke(new Action(() =>
            {
                ImgPreview.Source = new BitmapImage(new Uri(openFile.FileName, UriKind.RelativeOrAbsolute));
            }));

            Task.Run(() =>
            {
                var imagebyte = File.ReadAllBytes(openFile.FileName);

                Bitmap bitmap = new(new MemoryStream(imagebyte));

                OCRModelConfig? config = null;

                OCRParameter oCRParameter = new();
                OCRResult ocrResult = new();

                using (PaddleOCREngine engine = new(config, oCRParameter))
                {
                    ocrResult = engine.DetectText(bitmap);
                }
                if (ocrResult != null)
                {
                    Dispatcher.BeginInvoke(new Action(() =>
                    {
                        TxtPreview.Text = ocrResult.Text;
                    }));
                }
            });
        }
    }
}