/// <summary>
/// Specifies that text contains only the limited set of characters and
/// recognizes the text in image.
/// </summary>
/// <param name="filename">The name of file, which stores images with text.</param>
public static void OcrImageWithDigits(string filename)
{
// 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(
Vintasoft.Imaging.Ocr.OcrLanguage.English));
// set the "white list" of recognizing characters
tesseractOcr.SetVariable(
"tessedit_char_whitelist", "01234567890");
// for each image
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();
}
}