<Window x:Class="Tách_hình_thành_3_kênh_màu_RGB.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Tách_hình_thành_3_kênh_màu_RGB"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="1000">
	<Grid>
		<Grid.ColumnDefinitions>
			<ColumnDefinition></ColumnDefinition>
			<ColumnDefinition></ColumnDefinition>
			<ColumnDefinition></ColumnDefinition>
			<ColumnDefinition></ColumnDefinition>
		</Grid.ColumnDefinitions>
		<StackPanel Grid.Column="0">
			<TextBlock Text="Hình gốc:" FontSize="20"></TextBlock>
			<Image x:Name="ImgRoot" Stretch="Fill"></Image>
		</StackPanel>
		<StackPanel Grid.Column="1">
			<TextBlock Text="Hình đỏ (RED):" FontSize="20"></TextBlock>
			<Image x:Name="ImgRed" Stretch="Fill"></Image>
		</StackPanel>
		<StackPanel Grid.Column="2">
			<TextBlock Text="Hình xanh lá (GREEN):" FontSize="20"></TextBlock>
			<Image x:Name="ImgGreen" Stretch="Fill"></Image>
		</StackPanel>
		<StackPanel Grid.Column="3">
			<TextBlock Text="Hình xanh nước biển (BLUE):" FontSize="20"></TextBlock>
			<Image x:Name="ImgBlue" Stretch="Fill"></Image>
		</StackPanel>
	</Grid>
</Window>
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using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Tách_hình_thành_3_kênh_màu_RGB
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            string FileHinh = @"F:\Hình ảnh trên mạng\Hình ảnh trên mạng\Vương Vũ Tiệp\3.jpg";
            ImgRoot.Source = new BitmapImage(new Uri(FileHinh));
            Bitmap hinhgoc = new Bitmap(FileHinh);
            Bitmap Red = new Bitmap(hinhgoc.Width, hinhgoc.Height);
            Bitmap Green = new Bitmap(hinhgoc.Width, hinhgoc.Height);
            Bitmap Blue = new Bitmap(hinhgoc.Width, hinhgoc.Height);
            for (int x = 0; x < hinhgoc.Width; x++)
            {
                for (int y = 0; y < hinhgoc.Height; y++)
                {
                    System.Drawing.Color pixel = hinhgoc.GetPixel(x, y);
                    byte R = pixel.R;
                    byte G = pixel.G;
                    byte B = pixel.B;
                    byte A = pixel.A;
                    Red.SetPixel(x, y, System.Drawing.Color.FromArgb(A, R, 0, 0));
                    Green.SetPixel(x, y, System.Drawing.Color.FromArgb(A, 0, G, 0));
                    Blue.SetPixel(x, y, System.Drawing.Color.FromArgb(A, 0, 0, B));
                }
            }
        }
    }
}
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