Right click your Project > Select Manage NuGet Packages > select Browse > Typo System.Drawing.Common then Enter > Select System.Drawing.Common Item > Click Install Button ImageConverter.cs public class ImageConverter { public BitmapImage LoadImage(string imagePath) { BitmapImage bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.CacheOption = BitmapCacheOption.OnLoad; bitmapImage.UriSource = new Uri(imagePath, UriKind.RelativeOrAbsolute); bitmapImage.EndInit(); // Optionally, you can freeze the BitmapImage for improved performance bitmapImage.Freeze(); return bitmapImage; } public byte[] BitmapImageToByteArray(BitmapImage bitmapImage) { if (bitmapImage == null) throw new ArgumentNullException("bitmapImage"); // Ensure format is Black and White (1bpp) FormatConvertedBitmap convertedBitmap = new FormatConvertedBitmap(bitmapImage, PixelFormats.BlackWhite, null, 0); int stride = (convertedBitmap.PixelWidth + 7) / 8; // Calculate stride (bytes per row) int height = convertedBitmap.PixelHeight; byte[] imageData = new byte[stride * height]; // Copy bitmap data to byte array convertedBitmap.CopyPixels(imageData, stride, 0); return imageData; } public BitmapImage ByteArrayToBitmapImage(byte[] imageData, int width, int height) { if (imageData == null) throw new ArgumentNullException("imageData"); // Create BitmapSource from byte array BitmapSource bitmapSource = BitmapSource.Create(width, height, 96, 96, PixelFormats.BlackWhite, null, imageData, width / 8); // Convert BitmapSource to BitmapImage BitmapImage bitmapImage = new BitmapImage(); using (MemoryStream stream = new MemoryStream()) { BitmapEncoder encoder = new PngBitmapEncoder(); // Use any suitable encoder encoder.Frames.Add(BitmapFrame.Create(bitmapSource)); encoder.Save(stream); bitmapImage.BeginInit(); bitmapImage.CacheOption = BitmapCacheOption.OnLoad; bitmapImage.StreamSource = stream; bitmapImage.EndInit(); } return bitmapImage; } } MainWindow.xaml MainWindow.xaml.cs public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); var imageConverter = new ImageConverter(); var imagePath = @"F:2022CustomerCardCustomerCardServerUICustomerCardServerResImagespngerrir.png"; // Replace with your image file path var bitmapImage = imageConverter.LoadImage(imagePath); var imageArrays = imageConverter.BitmapImageToByteArray(bitmapImage); // send imageArrays to Arduino via serial port or wifi var bitmapImageMonocrome = imageConverter.ByteArrayToBitmapImage(imageArrays, 240, 240); imageControl.Source = bitmapImageMonocrome; } } Input Output