Class OcrEngineRecognitionRegionExample
    ''' <summary>
    ''' Recognizes text in the specified image region 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 OcrImageUsingTesseractEngine(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
                For Each image As Vintasoft.Imaging.VintasoftImage In images
                    ' set the recognition region
                    tesseractOcr.RecognitionRegion = New Vintasoft.Imaging.RegionOfInterest(0, 0, image.Width, image.Height \ 2)

                    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
End Class

class OcrEngineRecognitionRegionExample
{
    /// <summary>
    /// Recognizes text in the specified image region 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 OcrImageUsingTesseractEngine(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
                foreach (Vintasoft.Imaging.VintasoftImage image in images)
                {
                    // set the recognition region
                    tesseractOcr.RecognitionRegion =
                        new Vintasoft.Imaging.RegionOfInterest(0, 0, image.Width, image.Height / 2);

                    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();
        }
    }
}