//[System.Diagnostics.DebuggerNonUserCodeAttribute()]
private void backgroundWorkerOcr_DoWork(object sender, DoWorkEventArgs e)
{
// Get the BackgroundWorker that raised this event.
BackgroundWorker worker = sender as BackgroundWorker;
OCRImageEntity entity = (OCRImageEntity)e.Argument;
OCR <Image> ocrEngine = new OCRImages();
ocrEngine.PageSegMode = selectedPSM;
ocrEngine.OcrEngineMode = selectedOEM;
ocrEngine.Language = entity.Language;
// Assign the result of the computation to the Result property of the DoWorkEventArgs
// object. This is will be available to the RunWorkerCompleted eventhandler.
//e.Result = ocrEngine.RecognizeText(entity.ClonedImages, entity.Lang, entity.Rect, worker, e);
IList <Image> images = entity.ClonedImages;
for (int i = 0; i < images.Count; i++)
{
if (worker.CancellationPending)
{
e.Cancel = true;
break;
}
string result = ocrEngine.RecognizeText(((List <Image>)images).GetRange(i, 1), entity.Inputfilename, entity.Rect, worker, e);
worker.ReportProgress(i, result); // i is not really percentage
}
}
/// <summary>
/// Performs OCR for bulk/batch and console operations.
/// </summary>
/// <param name="imageFile">Image file</param>
/// <param name="outputFile">Output file without extension</param>
/// <param name="langCode">language code</param>
/// <param name="pageSegMode">page segmentation mode</param>
/// <param name="outputFormat">format of output file. Possible values: <code>text</code>, <code>text+</code> (with post-corrections), <code>hocr</code></param>
/// <param name="deskew">deskew</param>
public static void PerformOCR(string imageFile, string outputFile, string langCode, string pageSegMode, string outputFormat, bool deskew)
{
DirectoryInfo dir = Directory.GetParent(outputFile);
if (dir != null && !dir.Exists)
{
dir.Create();
}
bool postprocess = "text+" == outputFormat;
OCR <Image> ocrEngine = new OCRImages();
ocrEngine.PageSegMode = pageSegMode;
ocrEngine.Language = langCode;
ocrEngine.OutputFormat = outputFormat.Replace("+", string.Empty);
ocrEngine.OutputFile = outputFile;
ocrEngine.Deskew = deskew;
// convert PDF to TIFF
if (imageFile.ToLower().EndsWith(".pdf"))
{
imageFile = PdfUtilities.ConvertPdf2Tiff(imageFile);
}
ocrEngine.ProcessFile(imageFile);
// post-corrections for text+ output
if (postprocess)
{
string filename = outputFile + ".txt";
string result = File.ReadAllText(filename);
// postprocess to correct common OCR errors
result = Processor.PostProcess(result, langCode);
// correct letter cases
result = TextUtilities.CorrectLetterCases(result);
using (StreamWriter sw = new StreamWriter(filename, false, new System.Text.UTF8Encoding()))
{
sw.Write(result);
}
}
}
protected void setSegmentedRegions()
{
if (!this.segmentedRegionsToolStripMenuItem.IsChecked || imageList == null || this.buttonActualSize.IsEnabled)
{
this.imageCanvas.SegmentedRegions = null;
return;
}
OCR <System.Drawing.Image> ocrEngine = new OCRImages();
Dictionary <System.Windows.Media.SolidColorBrush, List <System.Drawing.Rectangle> > map = this.imageCanvas.SegmentedRegions;
if (map == null)
{
map = new Dictionary <System.Windows.Media.SolidColorBrush, List <System.Drawing.Rectangle> >();
}
System.Drawing.Bitmap image = (System.Drawing.Bitmap)imageList[imageIndex];
List <System.Drawing.Rectangle> regions;
if (toolStripMenuItemBlock.IsChecked)
{
if (!map.ContainsKey(System.Windows.Media.Brushes.Gray))
{
regions = ocrEngine.GetSegmentedRegions(image, PageIteratorLevel.Block);
map.Add(System.Windows.Media.Brushes.Gray, regions);
}
}
else
{
map.Remove(System.Windows.Media.Brushes.Gray);
}
if (toolStripMenuItemPara.IsChecked)
{
if (!map.ContainsKey(System.Windows.Media.Brushes.Green))
{
regions = ocrEngine.GetSegmentedRegions(image, PageIteratorLevel.Para);
map.Add(System.Windows.Media.Brushes.Green, regions);
}
}
else
{
map.Remove(System.Windows.Media.Brushes.Green);
}
if (toolStripMenuItemTextLine.IsChecked)
{
if (!map.ContainsKey(System.Windows.Media.Brushes.Red))
{
regions = ocrEngine.GetSegmentedRegions(image, PageIteratorLevel.TextLine);
map.Add(System.Windows.Media.Brushes.Red, regions);
}
}
else
{
map.Remove(System.Windows.Media.Brushes.Red);
}
if (toolStripMenuItemWord.IsChecked)
{
if (!map.ContainsKey(System.Windows.Media.Brushes.Blue))
{
regions = ocrEngine.GetSegmentedRegions(image, PageIteratorLevel.Word);
map.Add(System.Windows.Media.Brushes.Blue, regions);
}
}
else
{
map.Remove(System.Windows.Media.Brushes.Blue);
}
if (toolStripMenuItemSymbol.IsChecked)
{
if (!map.ContainsKey(System.Windows.Media.Brushes.Magenta))
{
regions = ocrEngine.GetSegmentedRegions(image, PageIteratorLevel.Symbol);
map.Add(System.Windows.Media.Brushes.Magenta, regions);
}
}
else
{
map.Remove(System.Windows.Media.Brushes.Magenta);
}
this.imageCanvas.SegmentedRegions = map;
}
