private void _btnRecognize_Click(object sender, EventArgs e)
{
try
{
using (WaitCursor wait = new WaitCursor())
{
DocumentFormat format = _documentFormatSelector.SelectedFormat;
String documentFileName = _lblImageFileName.Text;
documentFileName = string.Concat(documentFileName, ".", DocumentWriter.GetFormatFileExtension(format));
_ocrPage.Recognize(null);
using (IOcrDocument _document = _ocrEngine.DocumentManager.CreateDocument(null, OcrCreateDocumentOptions.AutoDeleteFile))
{
_document.Pages.Add(_ocrPage);
_document.Save(documentFileName, format, null);
}
// Engine will correct the page deskew before AutoZone or Recognize, so we need to load the page again form the engine.
_viewer.Image = _ocrPage.GetRasterImage();
_viewer.Refresh();
UpdateMyControls();
// if the "View Final Document" option is checked then no need to show this message since
// it will load the saved document file.
if (!_cbViewFinalDocument.Checked)
{
Messager.ShowInformation(this, String.Format("The output document file was saved at ({0})", documentFileName));
}
else
{
if (File.Exists(documentFileName))
{
try
{
Process.Start(documentFileName);
}
catch
{
Messager.ShowError(this, "Unable to open generated results file with external viewing application");
}
}
else
{
Messager.ShowError(this, "Unable to open generated results file with external viewing application.\nThe system cannot find the file specified");
}
}
}
}
catch (Exception ex)
{
Messager.ShowError(this, ex.Message);
}
}
private void DoSaveDocument(OcrProgressDialog dlg, Dictionary <string, object> args)
{
// Perform load and recognize here
OcrProgressCallback callback = dlg.OcrProgressCallback;
try
{
string documentFileName = args["documentFileName"] as string;
bool viewDocument = (bool)args["viewDocument"];
if (!dlg.IsCanceled)
{
// If we are not using a progress bar, update the description text
if (callback == null)
{
dlg.UpdateDescription("Saving the document ...");
}
PdfDocumentOptions pdfOptions = _ocrDocument.DocumentWriterInstance.GetOptions(DocumentFormat.Pdf) as PdfDocumentOptions;
pdfOptions.Producer = "LEAD Technologies, Inc.";
pdfOptions.Creator = "LEADTOOLS PDFWriter";
_ocrDocument.DocumentWriterInstance.SetOptions(DocumentFormat.Pdf, pdfOptions);
_ocrDocument.Save(documentFileName, DocumentFormat.Pdf, callback);
}
// If it has not been canceled, show the final document (if applicable)
if (!dlg.IsCanceled && viewDocument)
{
Process.Start(documentFileName);
}
}
catch (Exception ex)
{
ShowError(ex);
}
finally
{
if (callback == null)
{
dlg.EndOperation();
}
}
}
private void SaveText()
{
if (_imageViewer.HasImage)
{
SaveFileDialog dlg = new SaveFileDialog();
dlg.Filter = "Rich Text File (.rtf)|*.rtf|Text (.txt)|*.txt";
if (dlg.ShowDialog() == DialogResult.OK)
{
string ext = Path.GetExtension(dlg.FileName);
DocumentFormat outputFormat = DocumentFormat.Text;
switch (ext)
{
case ".txt":
outputFormat = DocumentFormat.Text;
break;
case ".rtf":
outputFormat = DocumentFormat.Rtf;
break;
}
using (IOcrDocument document = _ocrEngine.DocumentManager.CreateDocument())
{
document.Pages.AddPage(_imageViewer.Image, null);
document.Pages.Recognize(null);
RtfDocumentOptions rtfOptions = _ocrEngine.DocumentWriterInstance.GetOptions(DocumentFormat.Rtf) as RtfDocumentOptions;
if (rtfOptions != null)
{
rtfOptions.DropObjects = DocumentDropObjects.None;
rtfOptions.TextMode = DocumentTextMode.Framed;
_ocrEngine.DocumentWriterInstance.SetOptions(DocumentFormat.Rtf, rtfOptions);
}
document.Save(dlg.FileName, outputFormat, null);
}
}
}
}
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 ThreadProc(object stateInfo)
{
WorkItemData data = (WorkItemData)stateInfo;
IOcrEngine ocrEngine = null;
bool passedCriticalStage = false;
try
{
// See if we have canceled
lock (_abortedLockObject)
{
if (_aborted)
{
return;
}
}
string destinationFile = Path.Combine(data.DestinationDirectory, Path.GetFileName(data.SourceFile));
ocrEngine = data.OcrEngine;
lock (_abortedLockObject)
{
if (_aborted)
{
return;
}
}
// Convert this image file to a document
string extension = DocumentWriter.GetFormatFileExtension(data.Format);
destinationFile = string.Concat(destinationFile, ".", extension);
if (data.Format == DocumentFormat.Ltd && File.Exists(destinationFile))
{
File.Delete(destinationFile);
}
string sourceFile = Path.GetFileName(data.SourceFile);
try
{
// Create a document and add the pages
using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument(null, OcrCreateDocumentOptions.AutoDeleteFile))
{
// Get the image number of pages
int imagePageCount;
RasterCodecs codecs = ocrDocument.RasterCodecsInstance;
using (CodecsImageInfo imageInfo = codecs.GetInformation(data.SourceFile, true))
{
long maximumMemorySize = 42187;
IOcrSettingManager settingManager = ocrEngine.SettingManager;
// Get the maximum size of the bitmap from the setting
if (settingManager.IsSettingNameSupported("Recognition.MaximumPageConventionalMemorySize"))
{
int maximumConventionalMemorySize = settingManager.GetIntegerValue("Recognition.MaximumPageConventionalMemorySize");
maximumMemorySize = (long)maximumConventionalMemorySize * 1024;
}
SetRecommendedLoadingOptions(codecs, imageInfo, maximumMemorySize);
imagePageCount = imageInfo.TotalPages;
}
// Set the DocumentWriter options
using (MemoryStream ms = new MemoryStream(data.DocumentWriterOptions))
{
ocrDocument.DocumentWriterInstance.LoadOptions(ms);
}
passedCriticalStage = true;
//recognize and add pages
for (int pageNumber = 1; pageNumber <= imagePageCount; pageNumber++)
{
lock (_abortedLockObject)
{
if (_aborted)
{
return;
}
}
var image = codecs.Load(data.SourceFile, pageNumber);
using (var ocrPage = ocrEngine.CreatePage(image, OcrImageSharingMode.AutoDispose))
{
ocrPage.Recognize(null);
ocrDocument.Pages.Add(ocrPage);
}
}
// Save
ocrDocument.Save(destinationFile, data.Format, null);
}
}
finally
{
}
OnSuccess(destinationFile);
}
catch (Exception ex)
{
string message;
if (passedCriticalStage && data.FirstTry)
{
message = string.Format("Error '{0}' while converting file '{1}' (first time, quarantined)", ex.Message, data.SourceFile);
AddToQuarantine(data.SourceFile);
}
else if (passedCriticalStage && !data.FirstTry)
{
message = string.Format("Error '{0}' while converting file '{1}' (quarantined error)", ex.Message, data.SourceFile);
}
else
{
message = string.Format("Error '{0}' while converting file '{1}'", ex.Message, data.SourceFile);
}
OnError(message);
}
finally
{
if (ocrEngine != null && ocrEngine != data.OcrEngine)
{
ocrEngine.Dispose();
}
if (Interlocked.Decrement(ref _workItemCount) == 0)
{
_batchFinishedEvent.Set();
}
}
}
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;
}
}
}
