全局阈值分割

<Window x:Class="FirstSolver.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:ha="http://schemas.mvtec.com/halcondotnet"
        TextElement.Foreground="{DynamicResource MaterialDesignBody}"
        TextElement.FontWeight="Regular"
        TextElement.FontSize="16"
        TextOptions.TextFormattingMode="Ideal" 
        TextOptions.TextRenderingMode="ClearType"       
        Background="{DynamicResource MaterialDesignPaper}"
        FontFamily="Microsoft YaHei Light"
        Name="RootWindow" Title="Halcon全局阈值分割" WindowState="Maximized" WindowStartupLocation="CenterScreen">
    <materialDesign:DialogHost Identifier="RootDialog" DialogTheme="Inherit">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>

            <Grid Grid.Row="0">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition/>
                    <ColumnDefinition Width="Auto"/>
                </Grid.ColumnDefinitions>

                <TextBox Grid.Column="0" Style="{StaticResource MaterialDesignFilledTextBox}" materialDesign:HintAssist.Hint="图像文件" Name="TextBoxImagePath" IsReadOnly="True"/>
                <StackPanel Grid.Column="1" Orientation="Horizontal">
                    <Button Margin="4" Style="{StaticResource MaterialDesignIconButton}" Name="ButtonSelectFile" Click="ButtonSelectFile_Click">
                        <Button.Content>
                            <materialDesign:PackIcon Kind="FolderOpenOutline"/>
                        </Button.Content>
                    </Button>

                    <TextBox Margin="4" Name="TextBoxMinGray" Style="{StaticResource MaterialDesignFloatingHintTextBox}" materialDesign:HintAssist.Hint="最小灰度值" Text="0"/>
                    <TextBox Margin="4" Name="TextBoxMaxGray" Style="{StaticResource MaterialDesignFloatingHintTextBox}" materialDesign:HintAssist.Hint="最大灰度值" Text="122"/>

                    <Button Margin="4" Style="{StaticResource MaterialDesignIconButton}" Name="ButtonShowEdges" Click="ButtonShowEdges_Click">
                        <Button.Content>
                            <materialDesign:PackIcon Kind="HumanRunFast"/>
                        </Button.Content>
                    </Button>
                </StackPanel>
            </Grid>

            <ha:HSmartWindowControlWPF Grid.Row="1" Margin="4" Padding="8" Name="HWindowControlWPF1">
                <ha:HIconicDisplayObjectWPF x:Name="HIconicDisplayObjectWPFImage" />
                <ha:HIconicDisplayObjectWPF x:Name="HIconicDisplayObjectWPFRegion" HDraw="margin" HColor="red"/>
            </ha:HSmartWindowControlWPF>

            <StatusBar Grid.Row="2">
                <StatusBarItem>
                    <StackPanel Orientation="Horizontal">
                        <Label Content="连通域数量：" VerticalAlignment="Center"/>
                        <TextBlock Name="TextBlockRegionNums" VerticalAlignment="Center"/>
                    </StackPanel>
                </StatusBarItem>
            </StatusBar>
        </Grid>
    </materialDesign:DialogHost>
</Window>

using HalconDotNet;
using System.IO;
using System.Windows;
using System.Windows.Controls.Primitives;

namespace FirstSolver
{
    public partial class MainWindow : Window
    {
        /// <summary>
        /// 对话框宿主标识符
        /// </summary>
        public const string DialogHostIdentifier = "RootDialog";

        public MainWindow()
        {
            InitializeComponent();
        }

        private void ButtonSelectFile_Click(object sender, RoutedEventArgs e)
        {
            Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog()
            {
                Filter = "Image|*.jpg;*.bmp;*.png;*.tif;*.tga;*.ras;*.jp2;*.j2k;*.jpe",
                DereferenceLinks = true
            };

            if (dlg.ShowDialog() == true)
            {
                TextBoxImagePath.Text = dlg.FileName;
                ButtonShowEdges.RaiseEvent(new RoutedEventArgs(ButtonBase.ClickEvent));
            }
        }

        private void ButtonShowEdges_Click(object sender, RoutedEventArgs e)
        {
            string path = TextBoxImagePath.Text;
            if (string.IsNullOrEmpty(path) || !File.Exists(path)) return;

            HImage srcImage = new HImage(path);
            HRegion region = srcImage.Threshold(double.Parse(TextBoxMinGray.Text), double.Parse(TextBoxMaxGray.Text));

            HIconicDisplayObjectWPFImage.IconicObject = srcImage;
            HIconicDisplayObjectWPFRegion.IconicObject = region;
            int nums = region.Connection().CountObj();
            TextBlockRegionNums.Text = $"{nums}";
        }
    }
}