Leadtools.Forms.Ocr Namespace > IOcrPageCollection Interface > ExportPage Method : ExportPage(Int32) Method |
RasterImage ExportPage( int pageIndex )
'Declaration Overloads Function ExportPage( _ ByVal pageIndex As Integer _ ) As RasterImage
'Usage Dim instance As IOcrPageCollection Dim pageIndex As Integer Dim value As RasterImage value = instance.ExportPage(pageIndex)
RasterImage ExportPage( int pageIndex )
- (LTRasterImage*)exportPage:(int)pageIndex error:(NSError**)outError;
public RasterImage exportPage(int pageIndex)
function Leadtools.Forms.Ocr.IOcrPageCollection.ExportPage(Int32)( pageIndex )
RasterImage^ ExportPage( int pageIndex )
This method copies the image data to the created Leadtools.RasterImage object image. Therefore, after this method returns, there is no relationship between the returned value and the IOcrPage inside the OCR document. The returned Leadtools.RasterImage object will need to be disposed.
To export more than one page to a multi-page Leadtools.RasterImage object, use ExportPages(int firstPageIndex, int lastPageIndex).
This method is identical to calling IOcrPage.GetRasterImage() on the page whose index is at pageIndex.
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 ExportPageToRasterImageExample() Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif") Dim exportedFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "OcrExported.jpg") Dim codecs As New RasterCodecs() ' Create an instance of the engine Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, False) ' Since we have a RasterCodecs object, re-use it in the OCR engine. Although ' this demo will not use it, it is always a good practice ocrEngine.Startup(codecs, Nothing, Nothing, LEAD_VARS.OcrAdvantageRuntimeDir) ' Create an OCR document Using ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument() ' Add the image to the document ocrDocument.Pages.AddPage(tifFileName, Nothing) ' Export it back as a RasterImage Dim image As RasterImage = ocrDocument.Pages.ExportPage(0) ' Save this image to disk codecs.Save(image, exportedFileName, RasterImageFormat.Jpeg, 0) ' We need to dispose the image ourselves image.Dispose() End Using ' Shutdown the engine ' Note: calling Dispose will also automatically shutdown the engine if it has been started ocrEngine.Shutdown() End Using codecs.Dispose() 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 ExportPageToRasterImageExample() { string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif"); string exportedFileName = Path.Combine(LEAD_VARS.ImagesDir, "OcrExported.jpg"); RasterCodecs codecs = new RasterCodecs(); // Create an instance of the engine using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false)) { // Since we have a RasterCodecs object, re-use it in the OCR engine. Although // this demo will not use it, it is always a good practice ocrEngine.Startup(codecs, null, null, LEAD_VARS.OcrAdvantageRuntimeDir); // Create an OCR document using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument()) { // Add the image to the document ocrDocument.Pages.AddPage(tifFileName, null); // Export it back as a RasterImage RasterImage image = ocrDocument.Pages.ExportPage(0); // Save this image to disk codecs.Save(image, exportedFileName, RasterImageFormat.Jpeg, 0); // We need to dispose the image ourselves image.Dispose(); } // Shutdown the engine // Note: calling Dispose will also automatically shutdown the engine if it has been started ocrEngine.Shutdown(); } codecs.Dispose(); } 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 ExportPageToRasterImageExample() { string tifFileName = @"Assets\Ocr1.tif"; string exportedFileName = "OcrExported.jpg"; RasterCodecs codecs = new RasterCodecs(); // Create an instance of the engine IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false); // Since we have a RasterCodecs object, re-use it in the OCR engine. Although // this demo will not use it, it is always a good practice ocrEngine.Startup(codecs, null, String.Empty, Tools.OcrEnginePath); // Create an OCR document IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument(); // Add the image to the document StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(tifFileName); using (RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile))) { ocrDocument.Pages.AddPage(image, null); } // Export it back as a RasterImage RasterImage exportedImage = ocrDocument.Pages.ExportPage(0); // Save this image to disk StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(exportedFileName); await codecs.SaveAsync(exportedImage, LeadStreamFactory.Create(saveFile), RasterImageFormat.Jpeg, 0); // We need to dispose the image ourselves exportedImage.Dispose(); // Shutdown the engine ocrEngine.Shutdown(); codecs.Dispose(); }