c# - 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)
 {
   ScanImage = e.Image.Clone();
   ImageSource source = RasterImageConverter.ConvertToSource(ScanImage, ConvertToSourceOptions.None);
 }

How to convert ImageSource to Byte array?

Answer 1

Unless you explicitly need an ImageSource object, there's no need to convert to one. You can get a byte array containing the pixel data directly from Leadtools.RasterImage using this code:

int totalPixelBytes = e.Image.BytesPerLine * e.Image.Height;
byte[] byteArray = new byte[totalPixelBytes];
e.Image.GetRow(0, byteArray, 0, totalPixelBytes);

Note that this gives you only the raw pixel data.

If you need a memory stream or byte array that contains a complete image such as JPEG, you also do not need to convert to source. You can use the Leadtools.RasterCodecs class like this:

RasterCodecs codecs = new RasterCodecs();
System.IO.MemoryStream memStream = new System.IO.MemoryStream();
codecs.Save(e.Image, memStream, RasterImageFormat.Jpeg, 24);