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OcrAutoRecognizeRunJobEventArgs Class

Syntax
C#
C++/CLI
Java
Python
[SerializableAttribute()] 
public class OcrAutoRecognizeRunJobEventArgs : EventArgs 
public class OcrAutoRecognizeRunJobEvent extends EventObject 
[SerializableAttribute()] 
public ref class OcrAutoRecognizeRunJobEventArgs : public System.EventArgs  
class OcrAutoRecognizeRunJobEventArgs(EventArgs): 
Remarks

IOcrAutoRecognizeManager.JobStarted and IOcrAutoRecognizeManager.JobCompleted will trigger when Run, RunJob or RunJobAsync is called.

The JobStarted event occurs when a job is about to start. You can use this event to keep track of the number of jobs pending running. You can also examine OcrAutoRecognizeRunJobEventArgs.Job to get information on whether the job finished successfully and get error status if any. RunJob example shows complete source code of how to easily accomplish these tasks in your application.

The JobCompleted event will always occur when a job is run whether the job is aborted or completed.

To abort pending jobs in a multi-threaded application using IOcrAutoRecognizeManager, you subscribe to this event and set the value of OcrAutoRecognizeRunJobEventArgs.Status to OcrAutoRecognizeManagerJobStatus.Abort. You can also examine OcrAutoRecognizeRunJobEventArgs.Job and only abort certain jobs depending on your application logic.

IOcrAutoRecognizeManager allows you to modify the raster image, OCR page or OCR document during some parts of the operation. Refer to OcrAutoRecognizeJobOperationEventArgs.PageImage for more information an example.

Example
C#
Java
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Ocr; 
using Leadtools.Document.Writer; 
using Leadtools.Forms.Common; 
using Leadtools.WinForms; 
 
public class RunJobExample 
{ 
   // Number of documents that are pending 
   private int _documentsPending; 
   // Event to trigger when all documents are finished 
   private AutoResetEvent _allDocumentsFinishedEvent; 
 
      public void Start() 
   { 
      string imagesDirectory = LEAD_VARS.ImagesDir; 
      string documentsDirectory = Path.Combine(LEAD_VARS.ImagesDir, "RunJobExample"); 
 
      // Create the output (documents) directory 
      if (!Directory.Exists(documentsDirectory)) 
      { 
         Directory.CreateDirectory(documentsDirectory); 
      } 
 
      // Get all TIF files in input (images) directory 
      string[] imageFileNames = Directory.GetFiles(imagesDirectory, "*.tif"); 
      if (imageFileNames.Length == 0) 
      { 
         Console.WriteLine("No images to OCR"); 
         return; 
      } 
 
      // Create a new OCR engine instance 
      OcrEngineType engineType = OcrEngineType.LEAD; 
      Console.WriteLine(string.Format("Starting up {0} engine", engineType)); 
      using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(engineType)) 
      { 
         ocrEngine.Startup(null, null, null, LEAD_VARS.OcrLEADRuntimeDir); 
 
         // Setup document PDF save options: Image/Text with CCITT G4 encoding for B/W 
         DocumentWriter docWriter = ocrEngine.DocumentWriterInstance; 
         PdfDocumentOptions pdfOptions = docWriter.GetOptions(DocumentFormat.Pdf) as PdfDocumentOptions; 
         pdfOptions.ImageOverText = true; 
         pdfOptions.DocumentType = PdfDocumentType.Pdf; 
         pdfOptions.FontEmbedMode = DocumentFontEmbedMode.None; 
         pdfOptions.OneBitImageCompression = OneBitImageCompressionType.FaxG4; 
         docWriter.SetOptions(DocumentFormat.Pdf, pdfOptions); 
 
         // We are going to use multiple-threads, so disable threading in 
         // IOcrAutoRecognizeManager 
         IOcrAutoRecognizeManager autoRecognizeManager = ocrEngine.AutoRecognizeManager; 
         autoRecognizeManager.MaximumThreadsPerJob = 1; 
 
         // Tell the recognize manager to continue on errors 
         autoRecognizeManager.JobErrorMode = OcrAutoRecognizeManagerJobErrorMode.Continue; 
 
         // Instead of using events to trigger when documents are done, 
         // we will use the JobCompleted events of IOcrAutoRecognizeManager 
         // to decrement a counter and trigger one event when the counter reaches 0 
         autoRecognizeManager.JobStarted += new EventHandler<OcrAutoRecognizeRunJobEventArgs>(autoRecognizeManager_JobStarted); 
         autoRecognizeManager.JobCompleted += new EventHandler<OcrAutoRecognizeRunJobEventArgs>(autoRecognizeManager_JobCompleted); 
 
         int count = imageFileNames.Length; 
         _documentsPending = count; 
         _allDocumentsFinishedEvent = new AutoResetEvent(false); 
 
         for (int i = 0; i < count; i++) 
         { 
            // Create the job data 
            string imageFileName = imageFileNames[i]; 
            string name = "Document " + (i + 1).ToString(); 
            Console.WriteLine("Queuing {0} file {1}", name, imageFileName); 
 
            JobData data = new JobData(); 
            data.AutoRecognizeManager = autoRecognizeManager; 
            data.ImageFileName = imageFileName; 
            data.DocumentFileName = Path.Combine(documentsDirectory, Path.GetFileNameWithoutExtension(imageFileName) + ".pdf"); 
            data.JobName = name; 
 
            // Queue this job 
            ThreadPool.QueueUserWorkItem(new WaitCallback(RunJob), data); 
         } 
 
         // Wait for all documents to finish 
         _allDocumentsFinishedEvent.WaitOne(); 
         _allDocumentsFinishedEvent.Close(); 
 
         autoRecognizeManager.JobStarted -= new EventHandler<OcrAutoRecognizeRunJobEventArgs>(autoRecognizeManager_JobStarted); 
         autoRecognizeManager.JobCompleted -= new EventHandler<OcrAutoRecognizeRunJobEventArgs>(autoRecognizeManager_JobCompleted); 
 
         Console.WriteLine("All documents finished, check the result files in {0}", documentsDirectory); 
      } 
   } 
   private void autoRecognizeManager_JobStarted(object sender, OcrAutoRecognizeRunJobEventArgs e) 
   { 
      // This is not strictly needed in this example, we will 
      // use it to show information 
      Console.WriteLine("{0} started...", e.Job.JobData.JobName); 
 
      // Check if we need to abort 
      if (AbortJobs(e.Job)) 
      { 
         // Yes, abort all jobs 
         e.Job.AutoRecognizeManager.AbortAllJobs(); 
      } 
   } 
 
   private void autoRecognizeManager_JobCompleted(object sender, OcrAutoRecognizeRunJobEventArgs e) 
   { 
      string message = string.Format("{0} completed ", e.Job.JobData.JobName); 
 
      IOcrAutoRecognizeJob job = e.Job; 
 
      // Show any errors 
      if (job.Errors.Count == 0) 
      { 
         message += "successfully..."; 
      } 
      else 
      { 
         message += "with errors, first error is " + job.Errors[0].Exception.Message; 
 
         // And save the errors to a text file in the document directory 
         string documentFileName = job.JobData.DocumentFileName; 
         string textPathName = Path.Combine(Path.GetDirectoryName(documentFileName), Path.GetFileNameWithoutExtension(documentFileName) + "_errors.txt"); 
         using (StreamWriter writer = File.CreateText(textPathName)) 
         { 
            writer.WriteLine(job.JobData.JobName); 
            writer.WriteLine("Data:"); 
            writer.WriteLine(" Image file name: " + job.JobData.ImageFileName); 
            writer.WriteLine(" First page number: " + job.JobData.FirstPageNumber); 
            writer.WriteLine(" Last page number: " + job.JobData.LastPageNumber); 
            writer.WriteLine(" Format:" + job.JobData.Format); 
            writer.WriteLine(" Document file name: " + job.JobData.DocumentFileName); 
            writer.WriteLine("Errors:"); 
 
            foreach (OcrAutoRecognizeManagerJobError error in job.Errors) 
            { 
               writer.WriteLine(" Page: {0} during {1}. Error: {2}", error.ImagePageNumber, error.Operation, error.Exception.Message); 
            } 
         } 
      } 
 
      Console.WriteLine(message); 
 
      // Decrement the documents count, when we reach 0, we are done 
      // Since this will be called from multiple threads, we need 
      // to use a thread-safety procedure 
      int pending = Interlocked.Decrement(ref _documentsPending); 
 
      // If we are the last document, wait up main thread 
      if (pending == 0) 
      { 
         _allDocumentsFinishedEvent.Set(); 
      } 
   } 
 
   private class JobData 
   { 
      public IOcrAutoRecognizeManager AutoRecognizeManager; 
      public string ImageFileName; 
      public string DocumentFileName; 
      public string JobName; 
   } 
 
   private void RunJob(object state) 
   { 
      JobData data = state as JobData; 
 
      Console.WriteLine("Running {0}", data.JobName); 
 
      // Run it 
      OcrAutoRecognizeJobData jobData = new OcrAutoRecognizeJobData(data.ImageFileName, DocumentFormat.Pdf, data.DocumentFileName); 
      jobData.JobName = data.JobName; 
      IOcrAutoRecognizeJob job = data.AutoRecognizeManager.CreateJob(jobData); 
      data.AutoRecognizeManager.RunJob(job); 
   } 
 
   private bool AbortJobs(IOcrAutoRecognizeJob ocrJob) 
   { 
      // In your application, you can check if abortion is required, for example, if the user 
      // has pressed the Cancel button on a progress bar or if your service is shutting down. 
 
      // In this example, we will never abort, but you can change this code to return true 
      // upon any condition (or when a specific job is about to start) 
      // and the engine will abort all current and pending jobs 
      return false; 
   } 
} 
 
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.FileNotFoundException; 
import java.io.FileWriter; 
import java.io.FilenameFilter; 
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.concurrent.ExecutorService; 
import java.util.concurrent.Executors; 
import java.util.concurrent.atomic.AtomicInteger; 
 
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.document.writer.*; 
import leadtools.internal.AutoResetEvent; 
import leadtools.ocr.*; 
 
 
// Number of documents that are pending 
private int _documentsPending; 
// Event to trigger when all documents are finished 
private AutoResetEvent _allDocumentsFinishedEvent; 
// Thread usage 
private final static AtomicInteger at = new AtomicInteger(); 
 
public void OcrAutoRecognizeManagerRunJobExample() throws IOException { 
   String LEAD_VARS_ImagesDir = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String LEAD_VARS_OcrLEADRuntimeDir = "C:\\LEADTOOLS23\\Bin\\Common\\OcrLEADRuntime"; 
   String docsDir = combine(LEAD_VARS_ImagesDir, "RunJobExample"); 
   String imageDir = LEAD_VARS_ImagesDir; 
 
   // Create the output (documents) directory 
   Path docsPath = Paths.get(docsDir); 
   Files.createDirectories(docsPath); 
 
   // Get all TIF files in input (images) directory 
   Path imagePath = Paths.get(imageDir); 
   Files.createDirectories(imagePath); 
 
   FilenameFilter tifFileFilter = (d, s) -> { 
      return s.toLowerCase().endsWith(".tif"); 
   }; 
 
   File imageFolder = new File(imageDir); 
   String[] imageFileNames = imageFolder.list(tifFileFilter); 
   if (imageFileNames.length == 0) { 
      System.out.println("No images to OCR"); 
      return; 
   } 
 
   // Create a new OCR engine instance 
   OcrEngineType engineType = OcrEngineType.LEAD; 
   System.out.println("Starting up " + engineType + " engine"); 
   OcrEngine ocrEngine = OcrEngineManager.createEngine(engineType); 
 
   ocrEngine.startup(null, null, null, LEAD_VARS_OcrLEADRuntimeDir); 
 
   // Setup document PDF save options: Image/Text with CCITT G4 encoding for B/W 
   DocumentWriter docWriter = ocrEngine.getDocumentWriterInstance(); 
   PdfDocumentOptions pdfOptions = (PdfDocumentOptions) docWriter.getOptions(DocumentFormat.PDF); 
   pdfOptions.setImageOverText(true); 
   pdfOptions.setDocumentType(PdfDocumentType.PDF); 
   pdfOptions.setFontEmbedMode(DocumentFontEmbedMode.NONE); 
   pdfOptions.setOneBitImageCompression(OneBitImageCompressionType.FAX_G4); 
   docWriter.setOptions(DocumentFormat.PDF, pdfOptions); 
 
   // We are going to use multiple-threads, so disable threading in IOcrAutoRecognizeManager 
   OcrAutoRecognizeManager autoRecognizeManager = ocrEngine.getAutoRecognizeManager(); 
   autoRecognizeManager.setMaximumThreadsPerJob(1); 
 
   // Tell the recognize manager to continue on errors 
   autoRecognizeManager.setJobErrorMode(OcrAutoRecognizeManagerJobErrorMode.CONTINUE); 
 
   // Instead of using events to trigger when documents are done, 
   // we will use the JobCompleted events of IOcrAutoRecognizeManager 
   // to decrement a counter and trigger one event when the counter reaches 0 
   autoRecognizeManager.addJobStartedListener(autoRecognizeManager_JobStarted); 
   autoRecognizeManager.addJobCompletedListener(autoRecognizeManager_JobCompleted); 
   int count = imageFileNames.length; 
   _documentsPending = count; 
   at.set(_documentsPending); 
   _allDocumentsFinishedEvent = new AutoResetEvent(); 
 
   ExecutorService executorService = Executors.newFixedThreadPool(1); 
   System.out.println("Starting the threads and waiting..."); 
 
   for (int i = 0; i < count; i++) { 
      // Create the job data 
      String imageFileName = imageFileNames[i]; 
      String name = "Document " + (i + 1); 
      System.out.println("Queuing " + name + " file " + imageFileName); 
 
      JobData data = new JobData(); 
      data.AutoRecognizeManager = autoRecognizeManager; 
      data.ImageFileName = combine(LEAD_VARS_ImagesDir, imageFileName); 
      data.DocumentFileName = combine(docsDir,imageFileName.substring(0, imageFileName.indexOf(".")) + ".pdf"); 
      data.JobName = name; 
      File dataFile = new File(combine(docsDir,imageFileName.substring(0, imageFileName.indexOf(".")) + ".pdf")); 
      if (!dataFile.exists()) dataFile.createNewFile(); 
 
      Runnable runnableTask = new Runnable(){ 
 
         @Override 
         public void run(){ 
            RunJob(data); 
         } 
 
      }; 
  
      executorService.submit(runnableTask); 
   } 
 
   // Wait for all documents to finish 
   _allDocumentsFinishedEvent.waitOne(); 
   _allDocumentsFinishedEvent.close(); 
 
   System.out.println("All documents finished, check the result files in " + docsDir); 
   ocrEngine.dispose(); 
} 
 
OcrAutoRecognizeRunJobListener autoRecognizeManager_JobStarted = new OcrAutoRecognizeRunJobListener(){ 
 
   @Override public void onJob(OcrAutoRecognizeRunJobEvent e) { 
      // This is not strictly needed in this example, we will 
      // use it to show information 
      System.out.println(e.getJob().getJobData().getJobName()+" started..."); 
 
      // Check if we need to abort 
      if(AbortJobs(e.getJob())){ 
      // Yes, abort all jobs 
      e.getJob().getAutoRecognizeManager().abortAllJobs();} 
   } 
 
}; 
 
OcrAutoRecognizeRunJobListener autoRecognizeManager_JobCompleted = new OcrAutoRecognizeRunJobListener() { 
 
   @Override 
   public void onJob(OcrAutoRecognizeRunJobEvent e) { 
      OcrAutoRecognizeJob job = e.getJob(); 
      String message = job.getJobData().getJobName() + " completed "; 
 
      // Show any errors 
      if (job.getErrors().size()== 0) { 
         message += "successfully..."; 
      } 
      else { 
         message += " with errors, first error is " + job.getErrors().get(0).getException().getMessage(); 
 
         // And save the errors to a text file in the document directory 
         String documentFileName = job.getJobData().getDocumentFileName(); 
         File doc = new File(documentFileName); 
         String textPathName = combine(doc.getParent(), documentFileName.substring(0,documentFileName.indexOf(".")) + "_errors.txt"); 
 
         try (FileWriter writer = new FileWriter(textPathName)) { 
            writer.write(job.getJobData().getJobName()); 
            writer.write("Data:"+"\n"); 
            writer.write(" Image file name: " + job.getJobData().getImageFileName()+"\n"); 
            writer.write(" First page number: " + job.getJobData().getFirstPageNumber()+"\n"); 
            writer.write(" Last page number: " + job.getJobData().getLastPageNumber()+"\n"); 
            writer.write(" Format:" + job.getJobData().getFormat()+"\n"); 
            writer.write(" Document file name: " + job.getJobData().getDocumentFileName()+"\n"); 
            writer.write("Errors:"+"\n"); 
                
            for (OcrAutoRecognizeManagerJobError error : job.getErrors()) 
            { 
               writer.write(" Page: "+ error.getImagePageNumber() + " during " + error.getOperation() + ". Error: " + error.getException().getMessage() + "\n"); 
            } 
            writer.close(); 
         } catch (IOException e1) { 
            e1.printStackTrace(); 
         } 
      } 
 
      System.out.println(message); 
 
      // Decrement the documents count, when we reach 0, we are done 
      // Since this will be called from multiple threads, we need 
      // to use a thread-safety procedure 
      int pending = at.decrementAndGet(); 
      System.out.println(pending); 
          
      // If we are the last document, wait up main thread 
      if (pending == 0) 
         _allDocumentsFinishedEvent.set(); 
   } 
 
}; 
 
class JobData { 
   public OcrAutoRecognizeManager AutoRecognizeManager; 
   public String ImageFileName; 
   public String DocumentFileName; 
   public String JobName; 
} 
 
private void RunJob(JobData state) { 
   JobData data = state; 
   System.out.println("Running " + data.JobName); 
 
   // Run it 
   OcrAutoRecognizeJobData jobData = new OcrAutoRecognizeJobData( 
      data.ImageFileName,  
      DocumentFormat.PDF, 
      data.DocumentFileName 
   ); 
   jobData.setJobName(data.JobName); 
   OcrAutoRecognizeJob job = data.AutoRecognizeManager.createJob(jobData); 
   data.AutoRecognizeManager.runJob(job); 
} 
 
private boolean AbortJobs(OcrAutoRecognizeJob ocrJob) { 
   // In your application, you can check if abortion is required, for example, if the user 
   // has pressed the Cancel button on a progress bar or if your service is shutting down. 
 
   // In this example, we will never abort, but you can change this code to return true 
   // upon any condition (or when a specific job is about to start) 
   // and the engine will abort all current and pending jobs 
   return false; 
} 
 
public String combine(String path1, String path2) { 
   File file = new File(path1, path2); 
   return file.getPath(); 
} 
Requirements

Target Platforms

Help Version 23.0.2024.4.19
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Leadtools.Ocr Assembly
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.