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

Using Older Versions of System.Drawing with IronOCR

.NET 4.6.1 to .NET 4.8 projects come with a 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 is because IronOcr could not recognize System.Drawing.Image as a valid input type.

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

Possible Solutions

• Update System.Drawing.Common to version 6.0.0. The 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 the SixLabors.ImageSharp.Image type.

using IronOcr;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;

class Program
{
    static void Main()
    {
        var Ocr = new IronTesseract();

        // Load the image using SixLabors.ImageSharp
        Image image = Image.Load<Rgba32>("image.jpg");

        // Use the image as input for OCR
        using (var Input = new OcrInput(image))
        {
            // Perform OCR on the input
            var Result = Ocr.Read(Input);

            // Print the recognized text
            Console.WriteLine(Result.Text);
        }
    }
}

using IronOcr;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;

class Program
{
    static void Main()
    {
        var Ocr = new IronTesseract();

        // Load the image using SixLabors.ImageSharp
        Image image = Image.Load<Rgba32>("image.jpg");

        // Use the image as input for OCR
        using (var Input = new OcrInput(image))
        {
            // Perform OCR on the input
            var Result = Ocr.Read(Input);

            // Print the recognized text
            Console.WriteLine(Result.Text);
        }
    }
}

• The above code initializes an instance of IronTesseract, loads an image from a file using SixLabors.ImageSharp, and then processes the image with IronOCR to extract text.