How to convert ImageSource to Byte array?

Question

I use LeadTools for scanning.

I want to convert scanning image to byte.

void twainSession_AcquirePage(object sender, TwainAcquirePageEventArgs e)
 {
         


        

Answer 1

I use this class to work with Image in WPF

public static class ImageHelper
    {
        /// 

        /// ImageSource to bytes
        /// 
        /// 
        /// 
        /// 
        public static byte[] ImageSourceToBytes(BitmapEncoder encoder, ImageSource imageSource)
        {
            byte[] bytes = null;
            var bitmapSource = imageSource as BitmapSource;

            if (bitmapSource != null)
            {
                encoder.Frames.Add(BitmapFrame.Create(bitmapSource));

                using (var stream = new MemoryStream())
                {
                    encoder.Save(stream);
                    bytes = stream.ToArray();
                }
            }

            return bytes;
        }

        [DllImport("gdi32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        internal static extern bool DeleteObject(IntPtr value);

        public static BitmapSource GetImageStream(Image myImage)
        {
            var bitmap = new Bitmap(myImage);
            IntPtr bmpPt = bitmap.GetHbitmap();
            BitmapSource bitmapSource =
             System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                   bmpPt,
                   IntPtr.Zero,
                   Int32Rect.Empty,
                   BitmapSizeOptions.FromEmptyOptions());

            //freeze bitmapSource and clear memory to avoid memory leaks
            bitmapSource.Freeze();
            DeleteObject(bmpPt);

            return bitmapSource;
        }

        /// 

        /// Convert String to ImageFormat
        /// 
        /// 
        /// 
        public static System.Drawing.Imaging.ImageFormat ImageFormatFromString(string format)
        {
            if (format.Equals("Jpg"))
                format = "Jpeg";
            Type type = typeof(System.Drawing.Imaging.ImageFormat);
            BindingFlags flags = BindingFlags.GetProperty;
            object o = type.InvokeMember(format, flags, null, type, null);
            return (System.Drawing.Imaging.ImageFormat)o;
        }

        /// 

        /// Read image from path
        /// 
        /// 
        /// 
        /// 
        public static byte[] BytesFromImage(String imageFile, System.Drawing.Imaging.ImageFormat imageFormat)
        {
            MemoryStream ms = new MemoryStream();
            Image img = Image.FromFile(imageFile);
            img.Save(ms, imageFormat);
            return ms.ToArray();
        }

        /// 

        /// Convert image to byte array
        /// 
        /// 
        /// 
        /// 
        public static byte[] ImageToByteArray(System.Drawing.Image imageIn, System.Drawing.Imaging.ImageFormat imageFormat)
        {
            MemoryStream ms = new MemoryStream();
            imageIn.Save(ms, imageFormat);
            return ms.ToArray();
        }

        /// 

        /// Byte array to photo
        /// 
        /// 
        /// 
        public static Image ByteArrayToImage(byte[] byteArrayIn)
        {
            MemoryStream ms = new MemoryStream(byteArrayIn);
            Image returnImage = Image.FromStream(ms);
            return returnImage;
        }
    }

So try different approaches and modernize this class as you need.