/// <summary>
/// Gets OCR result from provided multi-page image and returns result as
/// list of strings for each page.
/// </summary>
/// <remarks>
/// Gets OCR result from provided multi-page image and returns result as
/// list of strings for each page. This method is used for tiff images
/// when preprocessing is not needed.
/// </remarks>
/// <param name="inputImage">
/// input image
/// <see cref="System.IO.FileInfo"/>
/// </param>
/// <param name="outputFormat">
/// selected
/// <see cref="OutputFormat"/>
/// for tesseract
/// </param>
/// <returns>
/// list of result string that will be written to a temporary files
/// later
/// </returns>
private IList <String> GetOcrResultForMultiPage(FileInfo inputImage, OutputFormat outputFormat)
{
IList <String> resultList = new List <String>();
try {
InitializeTesseract(outputFormat);
TesseractOcrUtil util = new TesseractOcrUtil();
util.InitializeImagesListFromTiff(inputImage);
int numOfPages = util.GetListOfPages().Count;
for (int i = 0; i < numOfPages; i++)
{
String result = util.GetOcrResultAsString(GetTesseractInstance(), util.GetListOfPages()[i], outputFormat);
resultList.Add(result);
}
}
catch (TesseractException e) {
String msg = MessageFormatUtil.Format(Tesseract4LogMessageConstant.TESSERACT_FAILED, e.Message);
LogManager.GetLogger(GetType()).Error(msg);
throw new Tesseract4OcrException(Tesseract4OcrException.TESSERACT_FAILED);
}
finally {
TesseractOcrUtil.DisposeTesseractInstance(GetTesseractInstance());
}
return(resultList);
}
