Got a PDF that we are having trouble reading an image from. This image is of a QRCode, which seems to be processed from a PDF, but the PDF Extractor fails to detect any images when imported from a Fax source.
Are there any suggestions for improving the quality of the image so that it is detected as an image?
Hi Marvin,
Thanks for your inquiry. I am afraid while testing the scenario with latest version of Aspose.Pdf for .NET 9.2.0, image is being extracted fine from both files.
However, in scanned PDF document whole page is detected as a single image as it is added a single image by Fax source.
PdfExtractor pdfExtractor = new PdfExtractor();
pdfExtractor.BindPdf(myDir + "fax-140507-0908.pdf");
//extract all the images
pdfExtractor.ExtractImage();
//get all the extracted images
while (pdfExtractor.HasNextImage())
pdfExtractor.GetNextImage(myDir + DateTime.Now.Ticks.ToString() + ".jpg");
Please feel free to contact us for any further assistance.
Best Regards,
I’ve added two additional PDFs, these also seem to show up as a single image. However, the QRcode in these “fax-works” PDFs does process.
Hi Marvin,
Hi Marvin,
Thanks for sharing the resource files.
I have tested the scenario using Aspose.Pdf for .NET 9.2.0 in Visual Studio 2010 application with target platform as .NET Framework 4.0, running over Windows 7(x64) and as per my observations, the images are properly being extracted.
For your reference, I have also attached the images being extracted over my end. Can you please share which version of API you are using.
[C#]
PdfExtractor pdfExtractor = new PdfExtractor();
pdfExtractor.BindPdf(myDir + "fax-works-2.pdf");
//extract all the images
pdfExtractor.ExtractImage();
//get all the extracted images
while (pdfExtractor.HasNextImage())
pdfExtractor.GetNextImage(myDir +“fax-works-2”+ DateTime.Now.Ticks.ToString() + ".jpg");
Started with Aspose.Pdf for .NET 8.9.0, upgraded to Aspose.Pdf for .NET 9.2.1. Also using Aspose.BarCode for .NET 6.2.0.
The image appears to be extracted, but not processed.
Do While pdfExtractor.HasNextImage()
writeText(
"Getting next image....")
' save image to stream
Dim imageStream As New MemoryStream()
pdfExtractor.GetNextImage(imageStream)
imageStream.Position = 0
writeText(
"Recognizing barcode....")
' recognize the barcode from the image stream above
Dim barcodeReader As Aspose.BarCodeRecognition.BarCodeReader
Try
barcodeReader =
New Aspose.BarCodeRecognition.BarCodeReader(imageStream, BarCodeReadType.QR)
Do While barcodeReader.Read()
m_qrcode = barcodeReader.GetCodeText()
writeText(
"Codetext found: " & m_qrcode & ", Symbology: " & barcodeReader.GetReadType().ToString())
Loop
Catch ex As Exception
writeText(ex.ToString)
errorResponse(ex.ToString,
"Error recognizing barcode: " & m_sourceFileInfo.FullName.ToString)
End Try
' close the reader
barcodeReader.Close()
Loop
Do While pdfExtractor.HasNextImage()
writeText(
"Getting next image....")
' save image to stream
Dim imageStream As New MemoryStream()
pdfExtractor.GetNextImage(imageStream)
imageStream.Position = 0
writeText(
"Recognizing barcode....")
' recognize the barcode from the image stream above
Dim barcodeReader As Aspose.BarCodeRecognition.BarCodeReader
Try
barcodeReader =
New Aspose.BarCodeRecognition.BarCodeReader(imageStream, BarCodeReadType.QR)
Do While barcodeReader.Read()
m_qrcode = barcodeReader.GetCodeText()
writeText(
"Codetext found: " & m_qrcode & ", Symbology: " & barcodeReader.GetReadType().ToString())
Loop
Catch ex As Exception
writeText(ex.ToString)
errorResponse(ex.ToString,
"Error recognizing barcode: " & m_sourceFileInfo.FullName.ToString)
End Try
' close the reader
barcodeReader.Close()
Loop
Hi Marvin,
Hi Marvin,
string[] files = Directory.GetFiles(@“C:\temp\test225”);<o:p></o:p>
foreach (string file in files)
{
int pageIndex = 0;
// bind the pdf
PdfConverter converter = new PdfConverter();
converter.BindPdf(file);
converter.RenderingOptions.BarcodeOptimization = true;
converter.DoConvert();
while (converter.HasNextImage())
{
pageIndex++;
MemoryStream pageStream = new MemoryStream();
converter.GetNextImage(pageStream, ImageFormat.Png);
using (BarCodeReader reader = new BarCodeReader(pageStream, BarCodeReadType.QR))
{
while (reader.Read())
{
Console.WriteLine(Path.GetFileName(file) + " Page#" + pageIndex + " Code Text: " + reader.GetCodeText() + " Type: " + reader.GetReadType());
}
}
}
}