LastPageIndex Property

Summary

Gets the zero-based index of the last page in the process that initiated the callback.

Syntax

Objective-C

C++/CLI

Java

Python

public int LastPageIndex { get; }

@property (nonatomic, assign, readonly) NSInteger lastPageIndex

public int getLastPageIndex()

property int LastPageIndex { 
   int get(); 
}

LastPageIndex # get  (IOcrProgressData)

Property Value

The zero-based index of the last page in the process that initiated the callback.

Remarks

FirstPageIndex and LastPageIndex corresponds to the index in the IOcrPageCollection of the first and last pages when a method such as Recognize(int firstPageIndex, int lastPageIndex, OcrProgressCallback callback) is called.

If a method that operates on a single page is called, such as IOcrPage.Recognize, then FirstPageIndex and LastPageIndex will be the same value and are equal to the index of IOcrPage in the IOcrPageCollection.

CurrentPageIndex is the index of the current page the operation is processing. CurrentPageIndex will run from FirstPageIndex to LastPageIndex.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Ocr; 
using Leadtools.Document.Writer; 
using Leadtools.Forms.Common; 
using Leadtools.WinForms; 
 
public void OcrProgressCallbackExample() 
{ 
   string logFileName = Path.Combine(LEAD_VARS.ImagesDir, "log.txt"); 
   string multiPageTifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr.tif"); 
   string pdfFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.pdf"); 
 
   // Create the log text writer 
   _log = File.CreateText(logFileName); 
 
   // Create an instance of the engine 
   using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD)) 
   { 
      // Start the engine using default parameters 
      ocrEngine.Startup(null, null, null, LEAD_VARS.OcrLEADRuntimeDir); 
 
      // Create an OCR document 
      using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument()) 
      { 
         // Add this image to the document 
         _log.WriteLine("Adding the pages"); 
         _log.WriteLine("********************************"); 
         ocrDocument.Pages.AddPages(multiPageTifFileName, 1, -1, new OcrProgressCallback(MyOcrProgressCallback)); 
 
         // Auto-recognize the zones in all the pages 
         _log.WriteLine("Auto-zoning"); 
         _log.WriteLine("********************************"); 
         ocrDocument.Pages.AutoZone(new OcrProgressCallback(MyOcrProgressCallback)); 
 
         // Recognize it and save it as PDF 
         _log.WriteLine("Recognizing"); 
         _log.WriteLine("********************************"); 
         ocrDocument.Pages.Recognize(new OcrProgressCallback(MyOcrProgressCallback)); 
         _log.WriteLine("Saving to PDF"); 
         _log.WriteLine("********************************"); 
         ocrDocument.Save(pdfFileName, DocumentFormat.Pdf, new OcrProgressCallback(MyOcrProgressCallback)); 
      } 
 
      // Shutdown the engine 
      // Note: calling Dispose will also automatically shutdown the engine if it has been started 
      ocrEngine.Shutdown(); 
   } 
 
   _log.WriteLine("********************************"); 
   _log.WriteLine("Complete"); 
   _log.Flush(); 
   _log.Close(); 
} 
// Text writer to save the log to 
private StreamWriter _log; 
 
private void MyOcrProgressCallback(IOcrProgressData data) 
{ 
   if (data.Percentage == 0) 
      _log.WriteLine("--------------------------"); 
 
   _log.WriteLine("Page:{0}({1}:{2}) {3}% Operation:{4}", 
      data.CurrentPageIndex.ToString("00"), 
      data.FirstPageIndex.ToString("00"), 
      data.LastPageIndex.ToString("00"), 
      data.Percentage.ToString("000"), 
      data.Operation); 
} 
 
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.FileWriter; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.document.writer.*; 
import leadtools.ocr.*; 
 
 
// Text writer to save the log to 
private FileWriter _log; 
 
public void OcrProgressCallbackExample() throws IOException { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   final String OCR_LEAD_RUNTIME_DIR = "C:\\LEADTOOLS23\\Bin\\Common\\OcrLEADRuntime"; 
   String logFileName = combine(LEAD_VARS_IMAGES_DIR, "log.txt"); 
   String multiPageTifFileName = combine(LEAD_VARS_IMAGES_DIR, "Ocr1.tif"); 
   String pdfFileName = combine(LEAD_VARS_IMAGES_DIR, "Ocr1.pdf"); 
 
   // Create the log text writer 
   _log = new FileWriter(logFileName); 
 
   // Create an instance of the engine 
   OcrEngine ocrEngine = OcrEngineManager.createEngine(OcrEngineType.LEAD); 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Start the engine using default parameters 
   ocrEngine.startup(null, null, null, OCR_LEAD_RUNTIME_DIR); 
 
   // Create an OCR document 
   OcrDocument ocrDocument = ocrEngine.getDocumentManager().createDocument(); 
 
   // Add this image to the document 
   _log.write("Adding the pages\n"); 
   _log.write("********************************\n"); 
   RasterImage image = codecs.load(multiPageTifFileName, 16, CodecsLoadByteOrder.BGR, 1, -1); 
   ocrDocument.getPages().addPages(image, 1, -1, myOcrProgressCallback); 
 
   // Auto-recognize the zones in all the pages 
   _log.write("Auto-zoning\n"); 
   _log.write("********************************\n"); 
   ocrDocument.getPages().autoZone(myOcrProgressCallback); 
 
   // Recognize it and save it as PDF 
   _log.write("Recognizing\n"); 
   _log.write("********************************\n"); 
   ocrDocument.getPages().recognize(myOcrProgressCallback); 
   _log.write("Saving to PDF\n"); 
   _log.write("********************************\n"); 
   ocrDocument.save(pdfFileName, DocumentFormat.PDF, myOcrProgressCallback); 
 
   // Shutdown the engine 
   // Note: calling Dispose will also automatically shutdown the engine if it has 
   // been started 
   ocrEngine.shutdown(); 
 
   _log.write("********************************\n"); 
   _log.write("Complete\n"); 
   _log.flush(); 
   _log.close(); 
 
   assertTrue("Log file unsuccessfully created", new File(logFileName).exists()); 
   System.out.println("output file successfully created"); 
} 
 
OcrProgressListener myOcrProgressCallback = new OcrProgressListener() { 
 
   @Override 
   public void onProgress(OcrProgressData data) { 
      if (data.getPercentage() == 0) { 
         try { 
            _log.write("--------------------------\n"); 
         } catch (IOException e) { 
            e.printStackTrace(); 
         } 
      } 
 
      try { 
         _log.write("Page:" + data.getCurrentPageIndex() + "(" + data.getFirstPageIndex() + ":" 
               + data.getLastPageIndex() + ") " + data.getPercentage() + "% Operation:" + data.getOperation() 
               + "\n"); 
      } catch (IOException e) { 
         e.printStackTrace(); 
      } 
   } 
 
};

Requirements

Target Platforms

Reference

IOcrProgressData Interface

IOcrProgressData Members

IOcrEngine Interface

Programming with the LEADTOOLS .NET OCR

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Help Version 23.0.2024.4.19

Leadtools.Ocr Assembly

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