Export the page at the specified index to a .NET stream.
public void ExportPage(
int pageIndex,
Stream stream,
RasterImageFormat format,
int bitsPerPixel
)
Overloads Sub ExportPage( _
ByVal pageIndex As Integer, _
ByVal stream As Stream, _
ByVal format As RasterImageFormat, _
ByVal bitsPerPixel As Integer _
)
- (BOOL)exportPageAtIndex:(NSUInteger)pageIndex
stream:(LTLeadStream *)stream
format:(LTRasterImageFormat)format
bitsPerPixel:(NSUInteger)bitsPerPixel
error:(NSError **)error
public void exportPage(int pageIndex,
ILeadStream stream,
RasterImageFormat format,
int bitsPerPixel)
void ExportPage(
int pageIndex,
Stream^ stream,
RasterImageFormat format,
int bitsPerPixel
)
pageIndex
The zero-based index of the page to export.
stream
The .NET stream to save the page to.
format
The image file format to use.
bitsPerPixel
The bits/pixel value of the result image file.
To export more than one page to a multipage file to a stream, use ExportPages(int firstPageIndex, int lastPageIndex, Stream stream, RasterImageFormat format, int bitsPerPixel, int firstSavePageNumber, CodecsSavePageMode pageMode).
You can export the page to any of the file formats supported by LEADTOOLS. For more information, refer to Summary of All Supported Image File Formats.
This member only works with memory-based documents and will throw an exception otherwise. For more information, refer to IOcrDocumentManager.CreateDocument and Programming with the LEADTOOLS .NET OCR.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Ocr;
using Leadtools.Document.Writer;
using Leadtools.Forms.Common;
using Leadtools.ImageProcessing.Core;
public void ExportPageToStream()
{
string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif");
string exportedFileName = Path.Combine(LEAD_VARS.ImagesDir, "OcrExported.jpg");
// Create an instance of the engine
using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, 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(null, null, null, LEAD_VARS.OcrLEADRuntimeDir);
// Create an OCR document
using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
{
// Add the image to the document
ocrDocument.Pages.AddPage(tifFileName, null);
// Save it to a file stream
using (FileStream fs = File.Create(exportedFileName))
{
ocrDocument.Pages.ExportPage(0, fs, RasterImageFormat.Jpeg, 0);
}
}
// 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 OcrLEADRuntimeDir = @"C:\LEADTOOLS 20\Bin\Common\OcrLEADRuntime";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Ocr
Imports Leadtools.Document.Writer
Imports Leadtools.Forms
Imports Leadtools.ImageProcessing.Core
Public Sub ExportPageToStream()
Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")
Dim exportedFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "OcrExported.jpg")
' Create an instance of the engine
Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, 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(Nothing, Nothing, Nothing, LEAD_VARS.OcrLEADRuntimeDir)
' Create an OCR document
Using ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument()
' Add the image to the document
ocrDocument.Pages.AddPage(tifFileName, Nothing)
' Save it to a file stream
Using fs As FileStream = File.Create(exportedFileName)
ocrDocument.Pages.ExportPage(0, fs, RasterImageFormat.Jpeg, 0)
End Using
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 OcrLEADRuntimeDir As String = "C:\LEADTOOLS 20\Bin\Common\OcrLEADRuntime"
End Class
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