Overloads Function AddPage( _
   ByVal stream As Stream, _
   ByVal callback As OcrProgressCallback _
) As IOcrPage

Visual Basic (Usage)	Copy Code
Dim instance As IOcrPageCollection Dim stream As Stream Dim callback As OcrProgressCallback Dim value As IOcrPage   value = instance.AddPage(stream, callback)

IOcrPage AddPage( 
   Stream stream,
   OcrProgressCallback callback
)

IOcrPage^ AddPage( 
   Stream^ stream,
   OcrProgressCallback^ callback
) 

Parameters

stream

A .NET stream containing the image.

callback

Optional callback to show operation progress.

Return Value

This method will load the first page from a raster image stored inside a .NET stream and adds it to the OCR document.

To add all or specific range of the pages of a multi-page image file stored in a .NET stream to the OCR document, use the AddPages(Stream stream, int imageFirstPageNumber, int imageLastPageNumber, OcrProgressCallback callback) method.

This method will add the page to the end of the collection if you already have pages in this IOcrPageCollection.

If you passed a Leadtools.Codecs.RasterCodecs object to the IOcrEngine.Startup, then this method will use the same Leadtools.Codecs.RasterCodecs object to load the raster image file. If you did not pass a Leadtools.Codecs.RasterCodecs object, the engine will create an instance the first time one of the add or export page methods is called.

The image file in stream can be any of the file formats supported by LEADTOOLS. For more information, refer to Summary of All Supported Image File Formats.

You can use the OcrProgressCallback to show the operation progress or to abort it. For more information and an example, refer to OcrProgressCallback.

The LEADTOOLS OCR engine supports pages of dots per inch (DPI) values of 150 and greater. If you try to add a page with a DPI of less than 150 then the engine might be able to recognize any data from this page.

Note, the LEADTOOLS Plus OCR engine does not support image size greater than A3 paper size (11.7 by 16.5 inches at 300 dpi). Attempting to add an image that has a size greater than A3 will result in an error. For document of size greater than the maximum allowed, you must first resize the image before adding it to the LEADTOOLS Plus OCR engine. The Professional and Advantage engines do not have a restriction on the image size.

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

Reference