1. IronOCR
  2. Troubleshooting
  3. Troubleshooting older version of System.Drawing

Troubleshooting older version of System.Drawing

.NET 4.6.1 to .NET 4.8 project comes with built-in System.Drawing version 4.0.0. This version of System.Drawing is out of support and may contain vulnerable code.


Trying to instantiate OcrInput from System.Drawing.Image will throw "IronOcr.Exceptions.IronOcrProductException: 'Unable to parse Object[] as a valid image file.'. This due to IronOcr could not recognize System.Drawing.Image as valid input type." exception

Trying to specify Image input type like OcrInput(Image: image) will throw "cannot convert from System.Drawing.Image to SixLabors.ImageSharp.Image" error

Possible solution

  • Update System.Drawing.Common to version 6.0.0

    Older version of System.Drawing is out of support and may contain vulnerable code.

  • Use SixLabors.ImageSharp version 2.1.3

    OcrInput can be instantiated with SixLabors.ImageSharp.Image type.

var Ocr = new IronTesseract();
Image image = Image.Load("image.jpg");
using (var Input = new OcrInput(image))
{
    var Result = Ocr.Read(Input);
    Console.WriteLine(Result.Text);
}