protected override void OnFormClosed(FormClosedEventArgs e)
{
// Clean up
// Save the last setting
Properties.Settings settings = new Properties.Settings();
if (_ocrEngine != null)
{
settings.OcrEngineType = _ocrEngine.EngineType.ToString();
}
settings.Save();
if (_ocrDocument != null)
{
_ocrDocument.Dispose();
_ocrDocument = null;
}
// Dispose the OCR engine (this will call Shutdown as well)
if (_ocrEngine != null)
{
_ocrEngine.Dispose();
_ocrEngine = null;
}
if (_rasterCodecs != null)
{
_rasterCodecs.Dispose();
_rasterCodecs = null;
}
base.OnFormClosed(e);
}
static void Main(string[] args)
{
string licenseFilePath = @"LEADTOOLS.lic";
string developerKey = @"mcxvXsdTqZbnbQrDM9FSk5+RAsBJLhAIot2m3qdpoDO8oK7YMWOw1z6YpXqhCnFE";
RasterSupport.SetLicense(licenseFilePath, developerKey);
// Assuming you added "using Leadtools.Codecs;", "using Leadtools.Forms.Ocr;" and "using Leadtools.Forms.DocumentWriters;" at the beginning of this class
// *** Step 1: Select the engine type and create an instance of the IOcrEngine interface.
// We will use the LEADTOOLS OCR Advantage engine and use it in the same process
IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Professional, false);
// *** Step 2: Startup the engine.
// Use the default parameters
ocrEngine.Startup(null, null, null, @"C:\LEADTOOLS 19\Bin\Common\OcrProfessionalRuntime64");
// *** Step 3: Create an OCR document with one or more pages.
IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument();
// Add all the pages of a multi-page TIF image to the document
ocrDocument.Pages.AddPages(@"C:\Users\Public\Documents\LEADTOOLS Images\OCR1.tif", 1, -1, null);
// *** Step 4: Establish zones on the page(s), either manually or automatically
// Automatic zoning
ocrDocument.Pages.AutoZone(null);
// *** Step 5: (Optional) Set the active languages to be used by the OCR engine
// Enable English and German languages
ocrEngine.LanguageManager.EnableLanguages(new string[] { "en", "de" });
// *** Step 6: (Optional) Set the spell checking engine
// Enable the spell checking system
ocrEngine.SpellCheckManager.SpellCheckEngine = OcrSpellCheckEngine.Native;
// *** Step 7: (Optional) Set any special recognition module options
// Change the zone method for the first zone in the first page to be Graphics so it will not be recognized
OcrZone ocrZone = ocrDocument.Pages[0].Zones[0];
ocrZone.ZoneType = OcrZoneType.Text;
ocrDocument.Pages[0].Zones[0] = ocrZone;
// *** Step 8: Recognize
ocrDocument.Pages.Recognize(null);
// *** Step 9: Save recognition results
// Save the results to a PDF file
ocrDocument.Save(@"C:\Users\Public\Documents\LEADTOOLS Images\Document.pdf", DocumentFormat.Pdf, null);
ocrDocument.Dispose();
// *** Step 10: Shut down the OCR engine when finished
ocrEngine.Shutdown();
ocrEngine.Dispose();
}
private void DoLoadAndRecognizeDocument(OcrProgressDialog dlg, Dictionary <string, object> args)
{
// Perform load and recognize here
OcrProgressCallback callback = dlg.OcrProgressCallback;
IOcrDocument ocrDocument = null;
try
{
string documentFileName = args["documentFileName"] as string;
ocrDocument = _ocrEngine.DocumentManager.CreateDocument("", OcrCreateDocumentOptions.InMemory);
IOcrPage ocrPage = null;
if (!dlg.IsCanceled)
{
// If we are not using a progress bar, update the description text
if (callback == null)
{
dlg.UpdateDescription("Loading the document (first page only)...");
}
ocrPage = ocrDocument.Pages.AddPage(documentFileName, callback);
}
if (!dlg.IsCanceled)
{
// If we are not using a progress bar, update the description text
if (callback == null)
{
dlg.UpdateDescription("Recognizing the page(s) of the document...");
}
ocrPage.Recognize(callback);
}
if (!dlg.IsCanceled)
{
// We did not cancel, use this document
SetDocument(ocrDocument, documentFileName);
ocrDocument = null;
}
}
catch (Exception ex)
{
ShowError(ex);
}
finally
{
if (callback == null)
{
dlg.EndOperation();
}
// Clean up
if (ocrDocument != null)
{
ocrDocument.Dispose();
}
}
}
private void DoWork()
{
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, _twainSession.SelectedSourceName()))
{
_canceled = true;
DialogResult = DialogResult.Cancel;
return;
}
// Create an OCR document
// Acquire the page(s)
// Deskew the page
// Add the pages to the engine
// Recognize
// Save to final document
_lblProcessing.Text = "Acquiring a page...";
_canceled = false;
_twainSession.AcquirePage += new EventHandler <TwainAcquirePageEventArgs>(_twainSession_AcquirePage);
try
{
if (!_canceled)
{
DialogResult res = _twainSession.Acquire(TwainUserInterfaceFlags.Show);
if (res != DialogResult.OK && _document.Pages.Count <= 0)
{
_canceled = true;
}
}
if (_document.Pages.Count > 0)
{
// We have the pages in the OCR engine, recognize them
if (!_canceled)
{
_document.Pages.Recognize(new OcrProgressCallback(OcrProgress));
}
if (!_canceled)
{
_document.Save(_documentFileName, _format, new OcrProgressCallback(OcrProgress));
}
// Show the final document
if (!_canceled && File.Exists(_documentFileName))
{
Process.Start(_documentFileName);
}
}
}
catch (Exception ex)
{
ShowError(ex);
}
finally
{
// Unhook from the twain events
_twainSession.AcquirePage -= new EventHandler <TwainAcquirePageEventArgs>(_twainSession_AcquirePage);
// Remove all the pages from the document
_document.Pages.Clear();
_document.Dispose();
if (!_canceled)
{
DialogResult = DialogResult.OK;
}
else
{
DialogResult = DialogResult.Cancel;
}
}
}