Private Sub OcrOmrExample()
' Create an instance of the engine
Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, False)
' Start the engine using default parameters
ocrEngine.Startup(Nothing, Nothing, Nothing, Nothing)
' We will use Mixed.tif shipped with LEADTOOLS in the Images folder. This image has 3 OMR check marks
Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Mixed.tif")
' Create an OCR document
Using ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument()
' Add a page to the document
Dim ocrPage As IOcrPage = ocrDocument.Pages.AddPage(tifFileName, Nothing)
' Add the OMR zones. We calculated the 3 OMR zone boundaries for this image perviously
Dim omrBounds() As LogicalRectangle = _
{ _
New LogicalRectangle(484, 98, 84, 78, LogicalUnit.Pixel), _
New LogicalRectangle(494, 184, 70, 54, LogicalUnit.Pixel), _
New LogicalRectangle(498, 244, 76, 76, LogicalUnit.Pixel) _
}
For Each omrBound As LogicalRectangle In omrBounds
' Create a new OMR zone and add it to the page
Dim zone As New OcrZone()
zone.ZoneType = OcrZoneType.Text
zone.FillMethod = OcrZoneFillMethod.Omr
zone.RecognitionModule = OcrZoneRecognitionModule.Omr
zone.Bounds = omrBound
ocrPage.Zones.Add(zone)
Next
' Show how many zones we have and they properties
Console.WriteLine("Page has {0} zones:", ocrPage.Zones.Count)
For i As Integer = 0 To ocrPage.Zones.Count - 1
Dim zone As OcrZone = ocrPage.Zones(i)
Console.WriteLine("{0}: Type: {1}, Fill method: {2}, Recognition Module: {3}", i + 1, zone.ZoneType, zone.FillMethod, zone.RecognitionModule)
Next
' Change the OMR options (Auto detection of frames with highest sensitivity)
Dim omrOptions As IOcrOmrOptions = ocrEngine.ZoneManager.OmrOptions
omrOptions.FrameDetectionMethod = OcrOmrFrameDetectionMethod.Auto
omrOptions.Sensitivity = OcrOmrSensitivity.Highest
' Recognize the page
Console.WriteLine("Recognizing...")
ocrPage.Recognize(Nothing)
' Now show the OMR zone properties
For i As Integer = 0 To ocrPage.Zones.Count - 1
Dim zone As OcrZone = ocrPage.Zones(i)
Console.WriteLine("{0}: State: {1}, Confidence: {2}", i + 1, zone.OmrState, zone.OmrConfidence)
Next
' Now save the result as PDF using the default characters representation for OMR states (0 for unfilled, 1 for filled)
Dim pdfFileName1 As String = Path.Combine(LEAD_VARS.ImagesDir, "Omr_Results1.pdf")
Console.WriteLine("Saving to {0}...", pdfFileName1)
ocrDocument.Save(pdfFileName1, DocumentFormat.Pdf, Nothing)
' Change the character representation for the OMR states to Y for unfilled, and X for filled
omrOptions.SetStateRecognitionCharacter(OcrOmrZoneState.Unfilled, "Y"c)
omrOptions.SetStateRecognitionCharacter(OcrOmrZoneState.Filled, "X"c)
Dim pdfFileName2 As String = Path.Combine(LEAD_VARS.ImagesDir, "Omr_Results2.pdf")
Console.WriteLine("Saving to {0}...", pdfFileName2)
ocrDocument.Save(pdfFileName2, DocumentFormat.Pdf, Nothing)
End Using
' Shutdown the engine
' Note: calling Dispose will also automatically shutdown the engine if it has been started
ocrEngine.Shutdown()
End Using
End Sub
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
private void OcrOmrExample()
{
// Create an instance of the engine
using(IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, false))
{
// Start the engine using default parameters
ocrEngine.Startup(null, null, null, null);
// We will use Mixed.tif shipped with LEADTOOLS in the Images folder. This image has 3 OMR check marks
string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Mixed.tif");
// Create an OCR document
using(IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
{
// Add a page to the document
IOcrPage ocrPage = ocrDocument.Pages.AddPage(tifFileName, null);
// Add the OMR zones. We calculated the 3 OMR zone boundaries for this image perviously
LogicalRectangle[] omrBounds =
{
new LogicalRectangle(484, 98, 84, 78, LogicalUnit.Pixel),
new LogicalRectangle(494, 184, 70, 54, LogicalUnit.Pixel),
new LogicalRectangle(498, 244, 76, 76, LogicalUnit.Pixel)
};
foreach(LogicalRectangle omrBound in omrBounds)
{
// Create a new OMR zone and add it to the page
OcrZone zone = new OcrZone();
zone.ZoneType = OcrZoneType.Text;
zone.FillMethod = OcrZoneFillMethod.Omr;
zone.RecognitionModule = OcrZoneRecognitionModule.Omr;
zone.Bounds = omrBound;
ocrPage.Zones.Add(zone);
}
// Show how many zones we have and they properties
Console.WriteLine("Page has {0} zones:", ocrPage.Zones.Count);
for(int i = 0; i < ocrPage.Zones.Count; i++)
{
OcrZone zone = ocrPage.Zones[i];
Console.WriteLine("{0}: Type: {1}, Fill method: {2}, Recognition Module: {3}", i + 1, zone.ZoneType, zone.FillMethod, zone.RecognitionModule);
}
// Change the OMR options (Auto detection of frames with highest sensitivity)
IOcrOmrOptions omrOptions = ocrEngine.ZoneManager.OmrOptions;
omrOptions.FrameDetectionMethod = OcrOmrFrameDetectionMethod.Auto;
omrOptions.Sensitivity = OcrOmrSensitivity.Highest;
// Recognize the page
Console.WriteLine("Recognizing...");
ocrPage.Recognize(null);
// Now show the OMR zone properties
for(int i = 0; i < ocrPage.Zones.Count; i++)
{
OcrZone zone = ocrPage.Zones[i];
Console.WriteLine("{0}: State: {1}, Confidence: {2}", i + 1, zone.OmrState, zone.OmrConfidence);
}
// Now save the result as PDF using the default characters representation for OMR states (0 for unfilled, 1 for filled)
string pdfFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Omr_Results1.pdf");
Console.WriteLine("Saving to {0}...", pdfFileName1);
ocrDocument.Save(pdfFileName1, DocumentFormat.Pdf, null);
// Change the character representation for the OMR states to Y for unfilled, and X for filled
omrOptions.SetStateRecognitionCharacter(OcrOmrZoneState.Unfilled, 'Y');
omrOptions.SetStateRecognitionCharacter(OcrOmrZoneState.Filled, 'X');
string pdfFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Omr_Results2.pdf");
Console.WriteLine("Saving to {0}...", pdfFileName2);
ocrDocument.Save(pdfFileName2, DocumentFormat.Pdf, null);
}
// Shutdown the engine
// Note: calling Dispose will also automatically shutdown the engine if it has been started
ocrEngine.Shutdown();
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
private async void OcrOmrExample()
{
// Create an instance of the engine
IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false);
// Start the engine using default parameters
ocrEngine.Startup(null, null, String.Empty, Tools.OcrEnginePath);
// We will use Mixed.tif shipped with LEADTOOLS in the Images folder. This image has 3 OMR check marks
string tifFileName = "Mixed.tif";
// Create an OCR document
IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument();
// Add a page to the document
IOcrPage ocrPage = null;
using (RasterCodecs codecs = new RasterCodecs())
{
StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(tifFileName);
using (RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)))
ocrPage = ocrDocument.Pages.AddPage(image, null);
}
// Add the OMR zones. We calculated the 3 OMR zone boundaries for this image perviously
LeadRect[] omrBounds =
{
LeadRectHelper.Create(484, 98, 84, 78),
LeadRectHelper.Create(494, 184, 70, 54),
LeadRectHelper.Create(498, 244, 76, 76)
};
foreach(LeadRect omrBound in omrBounds)
{
// Create a new OMR zone and add it to the page
OcrZone zone = new OcrZone();
zone.ZoneType = OcrZoneType.Text;
zone.FillMethod = OcrZoneFillMethod.Omr;
zone.RecognitionModule = OcrZoneRecognitionModule.Omr;
zone.Bounds = omrBound;
ocrPage.Zones.Add(zone);
}
// Show how many zones we have and they properties
Debug.WriteLine("Page has {0} zones:", ocrPage.Zones.Count);
for(int i = 0; i < ocrPage.Zones.Count; i++)
{
OcrZone zone = ocrPage.Zones[i];
Debug.WriteLine("{0}: Type: {1}, Fill method: {2}, Recognition Module: {3}", i + 1, zone.ZoneType, zone.FillMethod, zone.RecognitionModule);
}
// Change the OMR options (Auto detection of frames with highest sensitivity)
IOcrOmrOptions omrOptions = ocrEngine.ZoneManager.OmrOptions;
omrOptions.FrameDetectionMethod = OcrOmrFrameDetectionMethod.Auto;
omrOptions.Sensitivity = OcrOmrSensitivity.Highest;
// Recognize the page
Debug.WriteLine("Recognizing...");
ocrPage.Recognize(null);
// Now show the OMR zone properties
for(int i = 0; i < ocrPage.Zones.Count; i++)
{
OcrZone zone = ocrPage.Zones[i];
Debug.WriteLine("{0}: State: {1}, Confidence: {2}", i + 1, zone.OmrState, zone.OmrConfidence);
}
// Now save the result as PDF using the default characters representation for OMR states (0 for unfilled, 1 for filled)
string pdfFileName1 = "Omr_Results1.pdf";
Debug.WriteLine("Saving to {0}...", pdfFileName1);
StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(pdfFileName1, CreationCollisionOption.ReplaceExisting);
await ocrDocument.SaveAsync(LeadStreamFactory.Create(saveFile), DocumentFormat.Pdf, null);
// Change the character representation for the OMR states to Y for unfilled, and X for filled
omrOptions.SetStateRecognitionCharacter(OcrOmrZoneState.Unfilled, 'Y');
omrOptions.SetStateRecognitionCharacter(OcrOmrZoneState.Filled, 'X');
string pdfFileName2 = "Omr_Results2.pdf";
Debug.WriteLine("Saving to {0}...", pdfFileName2);
saveFile = await Tools.AppLocalFolder.CreateFileAsync(pdfFileName2, CreationCollisionOption.ReplaceExisting);
await ocrDocument.SaveAsync(LeadStreamFactory.Create(saveFile), DocumentFormat.Pdf, null);
// Shutdown the engine
ocrEngine.Shutdown();
}
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