ReplaceIntersectedCharacters(IEnumerable<LeadRect>,char) Method

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Ocr; 
using Leadtools.Forms.Common; 
using Leadtools.Document.Writer; 
using Leadtools.WinForms; 
using Leadtools.Drawing; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
public void OcrAndRedactToPdf() 
{ 
   string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "OCR1.tif"); 
   string pdfFileNameBefore = Path.Combine(LEAD_VARS.ImagesDir, "OCR-Redact-Before.pdf"); 
   string pdfFileNameAfter = Path.Combine(LEAD_VARS.ImagesDir, "OCR-Redact-After.pdf"); 
 
   // Create OCR engine 
   using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD)) 
   { 
      ocrEngine.Startup(null, null, null, LEAD_VARS.OcrLEADRuntimeDir); 
 
      // Load the OCR1.tif image and recognize it 
      RasterImage image = ocrEngine.RasterCodecsInstance.Load(tifFileName, 1); 
      using (IOcrPage ocrPage = ocrEngine.CreatePage(image, OcrImageSharingMode.AutoDispose)) 
      { 
         ocrPage.Recognize(null); 
 
         // Save it, note that all the data is in the result PDF file, including "Fast Facts" 
         using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument(null, OcrCreateDocumentOptions.AutoDeleteFile)) 
         { 
            ocrDocument.Pages.Add(ocrPage); 
            ocrDocument.Save(pdfFileNameBefore, DocumentFormat.Pdf, null); 
         } 
 
         // Now, redact "Fast Facts", this could be an input from the user based on rubber banding or Regex. 
         LeadRect redactRect = LeadRect.FromLTRB(300, 800, 730, 900); 
         char replaceCharacter = '*'; 
         IOcrPageCharacters ocrPageCharacters = ocrPage.GetRecognizedCharacters(); 
         ocrPageCharacters.ReplaceIntersectedCharacters(new LeadRect[] { redactRect }, replaceCharacter); 
         ocrPage.SetRecognizedCharacters(ocrPageCharacters); 
 
         // Save it again, note that "Fast Facts" is replaced with * characters 
         using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument(null, OcrCreateDocumentOptions.AutoDeleteFile)) 
         { 
            ocrDocument.Pages.Add(ocrPage); 
            ocrDocument.Save(pdfFileNameAfter, DocumentFormat.Pdf, null); 
         } 
      } 
   } 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
   public const string OcrLEADRuntimeDir = @"C:\LEADTOOLS23\Bin\Common\OcrLEADRuntime"; 
}