/// <summary>
/// Uses parallel processing to perform OCR on the mailing address region of the pdf files.
/// Calls other methods to update the pdf files with that OCR information and builds a
/// dictionary for file paths with associated page counts.
/// </summary>
/// <param name="inputFiles">List of files to be processed.</param>
/// <param name="currentFolder">Active input directory.</param>
/// <returns>Dictionary of file paths and associated page counts.</returns>
internal static Dictionary <string, int> Process(IEnumerable <string> inputFiles, KeyValuePair <string, string> currentFolder)
{
var filePageCounts = new ConcurrentDictionary <string, int>();
SetupOcrWorkingDirectory();
Parallel.ForEach(inputFiles, file =>
{
string returnedText;
using (var document = new PDFDocument(file))
{
filePageCounts.TryAdd(file.ToString(), document.Pages.Count);
using (var ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false))
{
ocrEngine.Startup(null, null, OcrWorkingDir, OcrAdvantageRuntimeDir);
ocrEngine.SpellCheckManager.SpellCheckEngine = OcrSpellCheckEngine.None;
returnedText = GetAddressBlockText(ocrEngine, document);
ocrEngine.Shutdown();
}
}
PdfUtility.OverlayOcrText(returnedText, file, currentFolder);
}
);
var returnDictionary = filePageCounts.ToDictionary(kvp => kvp.Key,
kvp => kvp.Value);
return(returnDictionary);
}
/// <summary>
/// IHeart OCR and Merge Utility created by: Michael Quinton
///
/// Takes the groups of input PDF files and performs OCR on the
/// mailing address. OCR output is overlaid with a first page marking
/// onto the files, then all files are merged in page count order. The
/// resulting file is then moved to the appropriate drop folder.
/// </summary>
private static void Main()
{
Console.WriteLine("IHeart Media OCR and Merge Utility");
if (!CheckForInputFiles())
{
return;
}
SetLeadtoolsLicense();
foreach (var currentFolder in Constants.InputFolders)
{
Constants.InputDirectory.DeleteAllContents();
GetInputFiles(currentFolder);
if (Constants.InputDirectory.IsEmpty())
{
continue;
}
LoadInputFileList();
_filePageCounts = LeadToolsOcr.Process(InputFiles, currentFolder);
PdfUtility.MergeAscendingPageCount(currentFolder, _filePageCounts);
InputFiles.Clear();
_filePageCounts.Clear();
GC.Collect();
GC.WaitForPendingFinalizers();
}
Constants.InputDirectory.DeleteAllContents();
ArchiveInputFiles();
DeleteOldErrorLogs();
}
