LastCharacterIndex Property

Summary

Gets or sets the last index of word value in the IOcrZoneCharacters.

Syntax

Objective-C

C++/CLI

Java

Python

public int LastCharacterIndex { get; set; }

@property (nonatomic, assign) NSUInteger lastCharacterIndex;

public int getLastCharacterIndex() 
public void setLastCharacterIndex(int value)

public: 
property int LastCharacterIndex { 
   int get(); 
   void set (    int ); 
}

LastCharacterIndex # get and set (OcrWord)

Property Value

The zero-based index of the last character that forms this word in the IOcrZoneCharacters used to create this OcrWord.

Remarks

You can get the recognized words of a zone with the IOcrZoneCharacters.GetWords method. This is a helper method that iterate through the OcrCharacter collection of the zone and constructs the words based on the OcrCharacter.Position flags.

You can get extra information about the characters in this word by iterating through the IOcrZoneCharacters collection with starting index of FirstCharacterIndex and ending index of LastCharacterIndex.

Example

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 RecognizedCharactersExample() 
{ 
   // Create an image with some text in it 
   RasterImage image = new RasterImage(RasterMemoryFlags.Conventional, 640, 200, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, IntPtr.Zero, 0); 
   Rectangle imageRect = new Rectangle(0, 0, image.ImageWidth, image.ImageHeight); 
 
   IntPtr hdc = RasterImagePainter.CreateLeadDC(image); 
   using (Graphics g = Graphics.FromHdc(hdc)) 
   { 
      g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; 
      g.FillRectangle(Brushes.White, imageRect); 
 
      using (Font f = new Font("Arial", 20, FontStyle.Regular)) 
         g.DrawString("Normal line", f, Brushes.Black, 0, 0); 
 
      using (Font f = new Font("Arial", 20, FontStyle.Bold)) 
         g.DrawString("Bold, italic and underline", f, Brushes.Black, 0, 40); 
 
      using (Font f = new Font("Courier New", 20, FontStyle.Regular)) 
         g.DrawString("Monospaced line", f, Brushes.Black, 0, 80); 
   } 
 
   RasterImagePainter.DeleteLeadDC(hdc); 
 
   string textFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyImageWithTest.txt"); 
   string pdfFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyImageWithTest.pdf"); 
 
   // 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 page 
      IOcrPage ocrPage = ocrEngine.CreatePage(image, OcrImageSharingMode.AutoDispose); 
 
      // Recognize this page 
      ocrPage.Recognize(null); 
 
      // Dump the characters into a text file 
      using (StreamWriter writer = File.CreateText(textFileName)) 
      { 
         IOcrPageCharacters ocrPageCharacters = ocrPage.GetRecognizedCharacters(); 
         foreach (IOcrZoneCharacters ocrZoneCharacters in ocrPageCharacters) 
         { 
            // Show the words found in this zone. Get the word boundaries in inches 
            ICollection<OcrWord> words = ocrZoneCharacters.GetWords(); 
            Console.WriteLine("Words:"); 
            foreach (OcrWord word in words) 
               Console.WriteLine("Word: {0}, at {1}, characters index from {2} to {3}", word.Value, word.Bounds, word.FirstCharacterIndex, word.LastCharacterIndex); 
 
            bool nextCharacterIsNewWord = true; 
 
            for (int i = 0; i < ocrZoneCharacters.Count; i++) 
            { 
               OcrCharacter ocrCharacter = ocrZoneCharacters[i]; 
 
               // Capitalize the first letter if this is a new word 
               if (nextCharacterIsNewWord) 
                  ocrCharacter.Code = Char.ToUpper(ocrCharacter.Code); 
 
               writer.WriteLine("Code: {0}, Confidence: {1}, WordIsCertain: {2}, Bounds: {3}, Position: {4}, FontSize: {5}, FontStyle: {6}", 
                  ocrCharacter.Code, 
                  ocrCharacter.Confidence, 
                  ocrCharacter.WordIsCertain, 
                  ocrCharacter.Bounds, 
                  ocrCharacter.Position, 
                  ocrCharacter.FontSize, 
                  ocrCharacter.FontStyle); 
 
               // If the character is bold, make it underline 
               if ((ocrCharacter.FontStyle & OcrCharacterFontStyle.Bold) == OcrCharacterFontStyle.Bold) 
               { 
                  ocrCharacter.FontStyle |= OcrCharacterFontStyle.Italic; 
                  ocrCharacter.FontStyle |= OcrCharacterFontStyle.Underline; 
               } 
 
               // Check if next character is the start of a new word 
               if ((ocrCharacter.Position & OcrCharacterPosition.EndOfWord) == OcrCharacterPosition.EndOfWord || 
                  (ocrCharacter.Position & OcrCharacterPosition.EndOfLine) == OcrCharacterPosition.EndOfLine) 
                  nextCharacterIsNewWord = true; 
               else 
                  nextCharacterIsNewWord = false; 
 
               ocrZoneCharacters[i] = ocrCharacter; 
            } 
         } 
 
         // Replace the characters with the modified one before we save 
         ocrPage.SetRecognizedCharacters(ocrPageCharacters); 
      } 
 
      // Create an OCR document so we can save the results 
      using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument(null, OcrCreateDocumentOptions.AutoDeleteFile)) 
      { 
         // Add the page and dispose it 
         ocrDocument.Pages.Add(ocrPage); 
         ocrPage.Dispose(); 
 
         // Show the recognition results 
         // Set the PDF options to save as PDF/A text only 
         PdfDocumentOptions pdfOptions = ocrEngine.DocumentWriterInstance.GetOptions(DocumentFormat.Pdf) as PdfDocumentOptions; 
         pdfOptions.DocumentType = PdfDocumentType.PdfA; 
         pdfOptions.ImageOverText = false; 
         ocrEngine.DocumentWriterInstance.SetOptions(DocumentFormat.Pdf, pdfOptions); 
 
         ocrDocument.Save(pdfFileName, DocumentFormat.Pdf, null); 
 
         // Open and check the result file, it should contain the following text 
         // "Normal Line" 
         // "Bold And Italic Line" 
         // "Monospaced Line" 
         // With the second line bold and underlined now 
      } 
 
      // Shutdown the engine 
      // Note: calling Dispose will also automatically shutdown the engine if it has been started 
      ocrEngine.Shutdown(); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
   public const string OcrLEADRuntimeDir = @"C:\LEADTOOLS23\Bin\Common\OcrLEADRuntime"; 
}