Bitmap has format null when created from Grayscale image

[MoHamzawy]

Describe the bug

I am working on a project where we use OpenCvSharp for handling images in the backend. For the frontend, we use Bitmap. I have created a simple converter as follows:

public static Bitmap? MatToBitmap(Mat image)
{
    // Try catch here in case Mat is disposed from UI thread.
    try
    {
        byte[] imageData = image.ImEncode(".png");
        using (var stream = new MemoryStream(imageData))
        {
            var bitmap = new Bitmap(stream);
            return bitmap;
        }
    }
    catch(Exception ex)
    {
        XLog.Error(ex.Message, "Failed to convert Mat to Bitmap");
        return null;
    }
}

The problem here is that if mat has 1 channel (gray scale) bitmap.Format is null

To Reproduce

Running the code above shows the problem.

Expected behavior

No response

Avalonia version

11.1.2

OS

No response

Additional context

No response