GetEngineFormatFileExtension Method

Summary

Gets the default file extension for the specified engine native format.

Syntax

C++/CLI

Java

Python

public string GetEngineFormatFileExtension( 
   string formatName 
)

public String getEngineFormatFileExtension(String formatName)

String^ GetEngineFormatFileExtension(  
   String^ formatName 
)

def GetEngineFormatFileExtension(self,formatName):

Parameters

formatName
The name of the engine native format requested.

Return Value

A String containing the file extension for the specified format (without the ".").

Remarks

This method returns the default file extension commonly used with file of types formatName. For example, Adobe PDF files commonly have "pdf" extensions, Microsoft Word documents commonly have "doc" extensions and so forth.

Note that the LEADTOOLS default installation does not ship with native engine format support. You must download and install the "OCR Additional Features" setup available at https://www.leadtools.com to add this feature. To get a list of the engine native formats available but not installed for the current OCR engine, use GetAdditionalEngineFormats.

For more information on the various document formats supported by LEADTOOLS refer to DocumentFormat.

Use the GetSupportedEngineFormats method in OcrEngineType.LEAD to get a list of names of the supported native formats. If the native format is supported, a native format can be used to save it, instead of using the save mechanism of the LEADTOOLS Document Writers.

To determine whether a specific engine native format is supported by this IOcrEngine, use IsEngineFormatSupported.

To get a friendly name for a specific engine native format, use GetEngineFormatFriendlyName.

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(); 
}