Leadtools.Forms.Ocr Namespace > IOcrPageCollection Interface > ExportPages Method : ExportPages(Int32,Int32,Stream,RasterImageFormat,Int32,Int32,CodecsSavePageMode) Method |
Determines how to handle the page when saving to multipage formats. This can be one of the following:
Value | Meaning |
---|---|
CodecsSavePageMode.Append | Append the new page(s) to the end of the file. If the file does not exist, this option will create the file and add the pages to it. firstSavePageNumber is not used. |
CodecsSavePageMode.Insert | Insert the new page(s) at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Replace | Replace the page(s) starting at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Overwrite | Overwrite the page(s) starting at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Append | Append the new page(s) to the end of the file. If the file does not exist, this option will create the file and add the pages to it. |
void ExportPages( int firstPageIndex, int lastPageIndex, Stream stream, RasterImageFormat format, int bitsPerPixel, int firstSavePageNumber, CodecsSavePageMode pageMode )
'Declaration Overloads Sub ExportPages( _ ByVal firstPageIndex As Integer, _ ByVal lastPageIndex As Integer, _ ByVal stream As Stream, _ ByVal format As RasterImageFormat, _ ByVal bitsPerPixel As Integer, _ ByVal firstSavePageNumber As Integer, _ ByVal pageMode As CodecsSavePageMode _ )
'Usage Dim instance As IOcrPageCollection Dim firstPageIndex As Integer Dim lastPageIndex As Integer Dim stream As Stream Dim format As RasterImageFormat Dim bitsPerPixel As Integer Dim firstSavePageNumber As Integer Dim pageMode As CodecsSavePageMode instance.ExportPages(firstPageIndex, lastPageIndex, stream, format, bitsPerPixel, firstSavePageNumber, pageMode)
void ExportPages( int firstPageIndex, int lastPageIndex, Stream stream, RasterImageFormat format, int bitsPerPixel, int firstSavePageNumber, CodecsSavePageMode pageMode )
function Leadtools.Forms.Ocr.IOcrPageCollection.ExportPages(Int32,Int32,Stream,RasterImageFormat,Int32,Int32,CodecsSavePageMode)( firstPageIndex , lastPageIndex , stream , format , bitsPerPixel , firstSavePageNumber , pageMode )
void ExportPages( int firstPageIndex, int lastPageIndex, Stream^ stream, RasterImageFormat format, int bitsPerPixel, int firstSavePageNumber, CodecsSavePageMode pageMode )
Determines how to handle the page when saving to multipage formats. This can be one of the following:
Value | Meaning |
---|---|
CodecsSavePageMode.Append | Append the new page(s) to the end of the file. If the file does not exist, this option will create the file and add the pages to it. firstSavePageNumber is not used. |
CodecsSavePageMode.Insert | Insert the new page(s) at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Replace | Replace the page(s) starting at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Overwrite | Overwrite the page(s) starting at the index specified by firstSavePageNumber. |
CodecsSavePageMode.Append | Append the new page(s) to the end of the file. If the file does not exist, this option will create the file and add the pages to it. |
To export one page to a .NET stream, use ExportPages(int pageIndex, Stream stream, RasterImageFormat format, int bitsPerPixel)
.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.
Public Sub ExportPagesToStream() Dim imagesPath As String = LEAD_VARS.ImagesDir Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "OcrMultiPage.tif") ' Create an instance of the engine Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, 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, Nothing) ' Create an OCR document Using ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument() ' Loop through the images, add them to the document For i As Integer = 0 To 3 Dim pageFileName As String = Path.Combine(imagesPath, String.Format("Ocr{0}.tif", i + 1)) ocrDocument.Pages.AddPage(pageFileName, Nothing) Next Console.WriteLine("OCR document contains {0} pages", ocrDocument.Pages.Count) ' Export the pages from index 1 to 3 to disk Using fs As FileStream = File.Create(tifFileName) ocrDocument.Pages.ExportPages(1, 3, fs, RasterImageFormat.Tif, 1, 1, CodecsSavePageMode.Overwrite) 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" End Class
public void ExportPagesToStream() { string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "OcrMultiPage.tif"); // Create an instance of the engine using(IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, 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, null); // Create an OCR document using(IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument()) { // Loop through the images, add them to the document for(int i = 0; i < 4; i++) { string pageFileName = Path.Combine(LEAD_VARS.ImagesDir, string.Format("Ocr{0}.tif", i + 1)); ocrDocument.Pages.AddPage(pageFileName, null); } Console.WriteLine("OCR Document contains {0} pages", ocrDocument.Pages.Count); // Export the pages from index 1 to 3 to disk using(FileStream fs = File.Create(tifFileName)) { ocrDocument.Pages.ExportPages(1, 3, fs, RasterImageFormat.Tif, 1, 1, CodecsSavePageMode.Overwrite); } } // 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"; }
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2