VintaSoft Imaging .NET SDK 14.1: Документация для .NET разработчика
Vintasoft.Imaging.Ocr Namespace / OcrEngine Class
Члены типа Объект Синтаксис Example Иерархия Требования Смотрите также
    Класс OcrEngine
    Представляет абстрактный базовый класс для механизма оптического распознавания символов.
    Объектная модель
    OcrLanguage RegionOfInterest ChangePixelFormatToBlackWhiteCommand ProcessingCommandBase OcrEngine
    Синтаксис
    'Declaration
    
    Public MustInherit Class OcrEngine
    
    
     
    Пример

    Вот C#/VB.NET код, который демонстрирует, как распознавать текст на изображении с помощью механизма OCR Tesseract.

    ''' <summary>
    ''' Recognizes text in image using Tesseract OCR engine.
    ''' </summary>
    ''' <param name="filename">The name of file, which stores images with text.</param>
    ''' <param name="ocrLanguage">The language of recognizing text.</param>
    Public Shared Sub RecognizeTextInImageUsingTesseractOcrEngine(filename As String, ocrLanguage As Vintasoft.Imaging.Ocr.OcrLanguage)
        ' create an image collection
        Using images As New Vintasoft.Imaging.ImageCollection()
            ' add images from file to the image collection
            images.Add(filename)
    
            System.Console.WriteLine("Create Tesseract OCR engine...")
            ' create the Tesseract OCR engine
            Using tesseractOcr As New Vintasoft.Imaging.Ocr.Tesseract.TesseractOcr()
                System.Console.WriteLine("Initialize OCR engine...")
                ' init the Tesseract OCR engine
                tesseractOcr.Init(New Vintasoft.Imaging.Ocr.OcrEngineSettings(ocrLanguage))
    
                ' for each image in image collection
                For Each image As Vintasoft.Imaging.VintasoftImage In images
                    System.Console.WriteLine("Recognize the image...")
    
                    ' recognize text in image
                    Dim ocrResult As Vintasoft.Imaging.Ocr.Results.OcrPage = tesseractOcr.Recognize(image)
    
                    ' output the recognized text
    
                    System.Console.WriteLine("Page Text:")
                    System.Console.WriteLine(ocrResult.GetText())
                    System.Console.WriteLine()
                Next
    
                ' shutdown the Tesseract OCR engine
                tesseractOcr.Shutdown()
            End Using
    
            ' free images
            images.ClearAndDisposeItems()
        End Using
    End Sub
    
    
    /// <summary>
    /// Recognizes text in image using Tesseract OCR engine.
    /// </summary>
    /// <param name="filename">The name of file, which stores images with text.</param>
    /// <param name="ocrLanguage">The language of recognizing text.</param>
    public static void RecognizeTextInImageUsingTesseractOcrEngine(
        string filename,
        Vintasoft.Imaging.Ocr.OcrLanguage ocrLanguage)
    {
        // create an image collection
        using (Vintasoft.Imaging.ImageCollection images = 
            new Vintasoft.Imaging.ImageCollection())
        {
            // add images from file to the image collection
            images.Add(filename);
    
            System.Console.WriteLine("Create Tesseract OCR engine...");
            // create the Tesseract OCR engine
            using (Vintasoft.Imaging.Ocr.Tesseract.TesseractOcr tesseractOcr = 
                new Vintasoft.Imaging.Ocr.Tesseract.TesseractOcr())
            {
                System.Console.WriteLine("Initialize OCR engine...");
                // init the Tesseract OCR engine
                tesseractOcr.Init(new Vintasoft.Imaging.Ocr.OcrEngineSettings(ocrLanguage));
    
                // for each image in image collection
                foreach (Vintasoft.Imaging.VintasoftImage image in images)
                {
                    System.Console.WriteLine("Recognize the image...");
                    
                    // recognize text in image
                    Vintasoft.Imaging.Ocr.Results.OcrPage ocrResult = tesseractOcr.Recognize(image);
    
                    // output the recognized text
    
                    System.Console.WriteLine("Page Text:");
                    System.Console.WriteLine(ocrResult.GetText());
                    System.Console.WriteLine();
                }
    
                // shutdown the Tesseract OCR engine
                tesseractOcr.Shutdown();
            }
    
            // free images
            images.ClearAndDisposeItems();
        }
    }
    
    

    Иерархия наследования
    Требования

    Целевые платформы: .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

    Смотрите также