RejectionSymbol Property

Summary

Gets or sets the character used as a symbol for the rejected characters in the final output document.

Syntax

C++/CLI

Java

Python

public char RejectionSymbol { get; set; }

public char getRejectionSymbol() 
public void setRejectionSymbol(char value)

property char RejectionSymbol { 
   char get(); 
   void set (    char ); 
}

RejectionSymbol # get and set (IOcrDocumentManager)

Property Value

The character used as a symbol for the rejected (i.e. unrecognized the recognition module used in the zone) characters in the final output document.

Remarks

In IOcrEngine there is a special internal code for marking the unrecognized characters (called rejected characters). However, when exporting to the final output document, the recognition result must contain this information, as well. The character which will be used as a placeholder for rejected characters is the rejection symbol.

The default rejection symbol is "~" (the tilde character)

For more information on recognition and rejected and missing symbols, refer to IOcrPage.Recognize.

Note: This property is read only for the LEADTOOLS OCR Module - LEAD Engine, setting this property will have no effect.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Ocr; 
using Leadtools.Forms.Common; 
using Leadtools.Document.Writer; 
using Leadtools.WinForms; 
 
public void OcrDocumentManagerExample() 
{ 
   string tifFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif"); 
   string tifFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Ocr2.tif"); 
   string outputDirectory = Path.Combine(LEAD_VARS.ImagesDir, "OutputDirectory"); 
 
   // Create the output directory 
   if (Directory.Exists(outputDirectory)) 
      Directory.Delete(outputDirectory, true); 
   Directory.CreateDirectory(outputDirectory); 
 
   // Create an instance of the engine 
   using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD)) 
   { 
      // Start the engine using default parameters 
      Console.WriteLine("Starting up the engine..."); 
      ocrEngine.Startup(null, null, null, LEAD_VARS.OcrLEADRuntimeDir); 
 
      // Create the OCR document 
      Console.WriteLine("Creating the OCR document..."); 
      IOcrDocumentManager ocrDocumentManager = ocrEngine.DocumentManager; 
      using (IOcrDocument ocrDocument = ocrDocumentManager.CreateDocument()) 
      { 
         // Add the pages to the document 
         Console.WriteLine("Adding the pages..."); 
         ocrDocument.Pages.AddPage(tifFileName1, null); 
         ocrDocument.Pages.AddPage(tifFileName2, null); 
 
         // Recognize the pages to this document. Note, we did not call AutoZone, it will explicitly be called by Recognize 
         Console.WriteLine("Recognizing all the pages..."); 
         ocrDocument.Pages.Recognize(null); 
 
         // Save to all the formats supported by this OCR engine 
         Array formats = Enum.GetValues(typeof(DocumentFormat)); 
         foreach (DocumentFormat format in formats) 
         { 
            string friendlyName = DocumentWriter.GetFormatFriendlyName(format); 
            Console.WriteLine("Saving (using default options) to {0}...", friendlyName); 
 
            // Construct the output file name (output_directory + document_format_name + . + extension) 
            string extension = DocumentWriter.GetFormatFileExtension(format); 
            string outputFileName = Path.Combine(outputDirectory, format.ToString() + "." + extension); 
 
            // Save the document 
            ocrDocument.Save(outputFileName, format, null); 
 
            // If this is the LTD format, convert it to PDF 
            if (format == DocumentFormat.Ltd) 
            { 
               Console.WriteLine("Converting the LTD file to PDF..."); 
               string pdfFileName = Path.Combine(outputDirectory, format.ToString() + "_pdf.pdf"); 
 
               DocumentWriter docWriter = ocrEngine.DocumentWriterInstance; 
               docWriter.Convert(outputFileName, pdfFileName, DocumentFormat.Pdf); 
            } 
         } 
 
         // Now save to all the engine native formats (if any) supported by the engine 
         string[] engineFormats = ocrDocumentManager.GetSupportedEngineFormats(); 
         foreach (string engineFormat in engineFormats) 
         { 
            string friendlyName = ocrDocumentManager.GetEngineFormatFriendlyName(engineFormat); 
            Console.WriteLine("Saving to engine native format {0}...", friendlyName); 
 
            // Construct the output file name (output_directory + "engine" + engine_format_name + . + extension) 
            string extension = ocrDocumentManager.GetEngineFormatFileExtension(engineFormat); 
            string outputFileName = Path.Combine(outputDirectory, "engine_" + engineFormat + "." + extension); 
 
            // To use this format, set it in the IOcrDocumentManager.EngineFormat and do a normal save using DocumentFormat.User 
 
            // Save the document 
            ocrDocumentManager.EngineFormat = engineFormat; 
            ocrDocument.Save(outputFileName, DocumentFormat.User, null); 
         } 
      } 
 
      // Shutdown the engine 
      // Note: calling Dispose will also automatically shutdown the engine if it has been started 
      Console.WriteLine("Shutting down..."); 
      ocrEngine.Shutdown(); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
   public const string OcrLEADRuntimeDir = @"C:\LEADTOOLS23\Bin\Common\OcrLEADRuntime"; 
}

 
import java.io.File; 
import java.io.IOException; 
import java.nio.file.Files; 
import java.nio.file.Path; 
import java.nio.file.Paths; 
 
import java.util.ArrayList; 
import java.util.List; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.assertTrue; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.document.writer.*; 
import leadtools.ocr.*; 
 
 
public void OcrDocumentManagerExample() throws IOException { 
   final var LEAD_VARS_ImagesDir = "C:\\LEADTOOLS23\\Resources\\Images"; 
   final String LEAD_VARS_OcrLEADRuntimeDir = "C:\\LEADTOOLS23\\Bin\\Common\\OcrLEADRuntime"; 
   ILeadStream leadStream1 = LeadStreamFactory.create("C:\\LEADTOOLS23\\Resources\\Images\\Ocr1.tif"); 
   ILeadStream leadStream2 = LeadStreamFactory.create("C:\\LEADTOOLS23\\Resources\\Images\\Ocr2.tif"); 
   String outDir = combine(LEAD_VARS_ImagesDir, "OcrDocumentManagerOutput"); 
       
   // Create the output directory 
   Path outPath = Paths.get(outDir); 
   Files.createDirectories(outPath); 
 
   // Create an instance of the engine 
   var ocrEngine = OcrEngineManager.createEngine(OcrEngineType.LEAD); 
       
   // Start the engine using default parameters 
   System.out.println("Starting up the engine..."); 
   ocrEngine.startup(null, null, null, LEAD_VARS_OcrLEADRuntimeDir); 
 
   // Create the OCR document 
   System.out.println("Creating the OCR document..."); 
   OcrDocumentManager ocrDocumentManager = ocrEngine.getDocumentManager(); 
   OcrDocument ocrDocument = ocrDocumentManager.createDocument(); 
       
   // Add the pages to the document 
   System.out.println("Adding the pages..."); 
   ocrDocument.getPages().addPage(leadStream1, null); 
   ocrDocument.getPages().addPage(leadStream2, null); 
 
   // Recognize the pages to this document. Note, we did not call AutoZone, it will explicitly be called by Recognize 
   System.out.println("Recognizing all the pages..."); 
   ocrDocument.getPages().recognize(null); 
 
   // Save to all the formats supported by this OCR engine 
   // DocumentFormat[] formats = Enum.GetValues(DocumentFormat); 
   DocumentFormat[] formats = DocumentFormat.values(); 
   for(var format : formats) { 
      // USER & XLSX formats are not supported 
      if (format.equals(DocumentFormat.USER) || format.equals(DocumentFormat.XLSX)) 
         continue; 
      String friendlyName = DocumentWriter.getFormatFriendlyName(format); 
      System.out.printf("Saving (using default options) to %s...", friendlyName); 
 
      // Construct the output file name (output_directory + document_format_name + . + extension) 
      String extension = DocumentWriter.getFormatFileExtension(format); 
      String outputFileName = combine(outDir, format.toString() + "." + extension); 
      assertTrue((new File(outputFileName)).exists()); 
 
      // Save the document 
      ocrDocument.save(outputFileName, format, null); 
 
      // If this is the LTD format, convert it to PDF 
      if (format == DocumentFormat.LTD) 
      { 
         System.out.println("Converting the LTD file to PDF..."); 
         var pdfFileName = combine(outDir, format.toString() + "_pdf.pdf"); 
 
         var docWriter = ocrEngine.getDocumentWriterInstance(); 
         docWriter.convert(outputFileName, pdfFileName, DocumentFormat.PDF); 
      } 
   } 
 
   // Now save to all the engine native formats (if any) supported by the engine 
   List<String> engineFormats = ocrDocumentManager.getSupportedEngineFormats(); 
   for (var engineFormat : engineFormats) 
   { 
      var friendlyName = ocrDocumentManager.getEngineFormatFriendlyName(engineFormat); 
      System.out.printf("Saving to engine native format {0}...", friendlyName); 
 
      // Construct the output file name (output_directory + "engine" + engine_format_name + . + extension) 
      var extension = ocrDocumentManager.getEngineFormatFileExtension(engineFormat); 
      var outputFileName = combine(outDir, "engine_" + engineFormat + "." + extension); 
 
      // To use this format, set it in the IOcrDocumentManager.EngineFormat and do a normal save using DocumentFormat.User 
 
      // Save the document 
      ocrDocumentManager.setEngineFormat(engineFormat); 
      ocrDocument.save(outputFileName, DocumentFormat.USER, null); 
   } 
 
   // Shutdown the engine 
   // Note: calling Dispose will also automatically shutdown the engine if it has been started 
   System.out.println("Shutting down..."); 
   ocrEngine.dispose(); 
}