HOW TO: Apply Redaction Annotation to Image and then OCR and save output as redacted searchable PDF

#1 Posted : Friday, November 18, 2016 2:58:20 PM(UTC)

Hadi

Groups: Manager, Tech Support, Administrators
Posts: 218

Was thanked: 12 time(s) in 12 post(s)

Using LEADTOOLS v19 and the Annotations SDK alongside the OCR SDK, I have created a sample that allows the user to load and redact an image and then OCR and save out the output.

Here is some of the relevant code:

This method will burn the annotations to the image using the RenderOnImage method:

Code:


      private RasterImage BurnImage()
      {
         RasterImage image = imageViewer.Image;
         annAutomationManager.RenderingEngine.RenderOnImage(annAutomation.Container, image);
         annAutomation.Container.Children.Clear();
         return image;
      }

This method will OCR the image and save the results as a PDF with Image Over Text enabled in order to see the redaction in the output:

Code:

      private void DoOCR(RasterImage image, string fileName)
      {
         using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false))
         {
            ocrEngine.Startup(null, null, null, null);

            PdfDocumentOptions pdfOptions = ocrEngine.DocumentWriterInstance.GetOptions(DocumentFormat.Pdf) as PdfDocumentOptions;
            pdfOptions.ImageOverText = true;
            ocrEngine.DocumentWriterInstance.SetOptions(DocumentFormat.Pdf, pdfOptions);

            using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
            {
               ocrDocument.Pages.AddPage(image, null);
               ocrDocument.Pages.Recognize(null);
               ocrDocument.Save(fileName, DocumentFormat.Pdf, null);
            }
         }
      }

File Attachment(s):

PDF Redaction OCR.zip (12kb) downloaded 149 time(s).

Hadi Chami
Developer Support Manager
LEAD Technologies, Inc.

Notification

HOW TO: Apply Redaction Annotation to Image and then OCR and save output as redacted searchable PDF - Load, Annotated, Burn, and OCR an image and save as image over text enabled PDF


	Try the latest version of LEADTOOLS for free for 60 days by downloading the evaluation: https://www.leadtools.com/downloads Wanna join the discussion? Login to your LEADTOOLS Support account or Register a new forum account.