QRCode Decode from PDF using Thoughtworks QRCode

Question

Using Thoughtworks and spirepdf trying to decode QR code

 

Check the code below

private static void GetImages(string sourcePdf, string outputPath)
{
PdfDocument doc = new PdfDocument();
doc.LoadFromFile(sourcePdf);
outputPath = System.IO.Path.Combine(outputPath, String.Format(@"{0}.jpg", 0));
for (int i = 0; i < doc.Pages.Count; i++)
{
string QRCodeString = "";
PdfPageBase page = doc.Pages[i];
System.IO.Stream[] images = page.ExtractImages();
foreach (System.IO.Stream image in images)
{
QRCodeString = GetQRCodeString(Bitmap.FromStream(image), outputPath);
if (QRCodeString == "")
{
continue;
//QRCodeString == "Not supported in Spire.Barcode Evaluation version. " ||
}
else
{
QRCodeDecoder decoder = new QRCodeDecoder();
String decodedString = decoder.decode(new QRCodeBitmapImage(new System.Drawing.Bitmap(image)), System.Text.Encoding.UTF8);
Console.WriteLine(decodedString);
}
}
Console.WriteLine(QRCodeString);
}
}
private static string GetQRCodeString(System.Drawing.Image img, string outPutPath)
{
img.Save(outPutPath, System.Drawing.Imaging.ImageFormat.Jpeg);
string scaningResult = Spire.Barcode.BarcodeScanner.ScanOne(outPutPath);
System.IO.File.Delete(outPutPath);
return scaningResult;
}

It is working for those pdf having Bar code at the top right corner. And showing for other positions

 

Error: ThoughtWorks.QRCode.ExceptionHandler.DecodingFailedException: 'Give up decoding'

 

Please help