Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms.Ocr
Imports Leadtools.Forms
Imports Leadtools.Forms.DocumentWriters
Imports Leadtools.WinForms
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.Drawing
Public Sub PageCollectionExamples()
' For this example, we need a multi-page TIF file.
' Create a muti-page TIF from Ocr1.tif, Ocr2.tif, Ocr3.tif and Ocr4.tif
Dim imagesPath As String = LEAD_VARS.ImagesDir
Dim tifFileName As String = Path.Combine(imagesPath, "Ocr.tif")
If (File.Exists(tifFileName)) Then
File.Delete(tifFileName)
End If
Using codecs As New RasterCodecs()
For i As Integer = 0 To 3
Dim pageFileName As String = Path.Combine(imagesPath, String.Format("Ocr{0}.tif", i + 1))
Using image As RasterImage = codecs.Load(pageFileName)
codecs.Save(image, tifFileName, RasterImageFormat.CcittGroup4, 1, 1, 1, -1, CodecsSavePageMode.Append)
End Using
Next
End Using
Dim pdfFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr.pdf")
' Create an instance of the engine
Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, False)
' Start the engine using default parameters
ocrEngine.Startup(Nothing, Nothing, Nothing, LEAD_VARS.OcrAdvantageRuntimeDir)
' Create an OCR document
Using ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument()
' Load all the pages of the multi-page tif file we created into the document
ocrDocument.Pages.AddPages(tifFileName, 1, -1, Nothing)
Console.WriteLine("{0} pages added to the document", ocrDocument.Pages.Count)
' Auto-zone
ocrDocument.Pages.AutoZone(Nothing)
' Recognize
ocrDocument.Pages.Recognize(Nothing)
' Save
ocrDocument.Save(pdfFileName, 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"
Public Const OcrAdvantageRuntimeDir As String = "C:\LEADTOOLS 18\Bin\Common\OcrAdvantageRuntime"
End Class
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms.Ocr;
using Leadtools.Forms.DocumentWriters;
using Leadtools.Forms;
using Leadtools.ImageProcessing.Core;
public void PageCollectionExamples()
{
// For this example, we need a multi-page TIF file.
// Create a muti-page TIF from Ocr1.tif, Ocr2.tif, Ocr3.tif and Ocr4.tif
string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr.tif");
if (File.Exists(tifFileName))
File.Delete(tifFileName);
using (RasterCodecs codecs = new RasterCodecs())
{
for (int i = 0; i < 4; i++)
{
string pageFileName = Path.Combine(LEAD_VARS.ImagesDir, string.Format("Ocr{0}.tif", i + 1));
using (RasterImage image = codecs.Load(pageFileName))
codecs.Save(image, tifFileName, RasterImageFormat.CcittGroup4, 1, 1, 1, -1, CodecsSavePageMode.Append);
}
}
string pdfFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr.pdf");
// Create an instance of the engine
using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false))
{
// Start the engine using default parameters
ocrEngine.Startup(null, null, null, LEAD_VARS.OcrAdvantageRuntimeDir);
// Create an OCR document
using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
{
// Load all the pages of the multi-page tif file we created into the form
ocrDocument.Pages.AddPages(tifFileName, 1, -1, null);
Console.WriteLine("{0} pages added to the document", ocrDocument.Pages.Count);
// Auto-zone
ocrDocument.Pages.AutoZone(null);
// Recognize
ocrDocument.Pages.Recognize(null);
// Save
ocrDocument.Save(pdfFileName, 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";
public const string OcrAdvantageRuntimeDir = @"C:\LEADTOOLS 18\Bin\Common\OcrAdvantageRuntime";
}
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms.Ocr;
using Leadtools.Forms.DocumentWriters;
using Leadtools.Forms;
using Leadtools.ImageProcessing.Core;
[TestMethod]
public async Task PageCollectionExamples()
{
// For this example, we need a multi-page TIF file.
string tifFileName = @"Assets\Ocr1.tif";
string pdfFileName = "Ocr.pdf";
// 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);
// Create an OCR document
IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument();
// Load all the pages of the multi-page tif file we created into the form
using (RasterCodecs codecs = new RasterCodecs())
{
StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(tifFileName);
using (RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)))
{
ocrDocument.Pages.AddPage(image, null);
Debug.WriteLine("{0} pages added to the document", ocrDocument.Pages.Count);
}
}
// Auto-zone
ocrDocument.Pages.AutoZone(null);
// Recognize
ocrDocument.Pages.Recognize(null);
// Save
StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(pdfFileName, CreationCollisionOption.ReplaceExisting);
await ocrDocument.SaveAsync(LeadStreamFactory.Create(saveFile), DocumentFormat.Pdf, null);
// Shutdown the engine
ocrEngine.Shutdown();
}
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