InsertPage(Int32,Stream,OcrProgressCallback) Method

IOcrPage InsertPage( 
   int pageIndex,
   Stream stream,
   OcrProgressCallback callback
)

'Declaration
 
Overloads Function InsertPage( _
   ByVal pageIndex As Integer, _
   ByVal stream As Stream, _
   ByVal callback As OcrProgressCallback _
) As IOcrPage

'Usage
 
Dim instance As IOcrPageCollection
Dim pageIndex As Integer
Dim stream As Stream
Dim callback As OcrProgressCallback
Dim value As IOcrPage
 
value = instance.InsertPage(pageIndex, stream, callback)

IOcrPage InsertPage( 
   int pageIndex,
   Stream stream,
   OcrProgressCallback callback
)

- (LTOcrPage*)insertPage:(int)pageIndex
                  stream:(LTLeadStream*)stream
                  target:(id)target
                selector:(SEL)selector
                   error:(NSError**)outError;
            

public OcrPage insertPage(int pageIndex,
                          ILeadStream stream,
                          OcrProgressListener callback)
            

function Leadtools.Forms.Ocr.IOcrPageCollection.InsertPage(Int32,Stream,OcrProgressCallback)( 
   pageIndex ,
   stream ,
   callback 
)

IOcrPage^ InsertPage( 
   int pageIndex,
   Stream^ stream,
   OcrProgressCallback^ callback
) 

Parameters

pageIndex

The zero-based index at which stream should be inserted.

stream

The .NET stream object containing the image.

callback

Optional callback to show operation progress.

Return Value

This method will load the first page from a raster image file in the stream and inserts it to the OCR document at the specified location.

To insert all or specific range of the pages of a multi-page image from a stream to the OCR document, use the InsertPages(int pageIndex, Stream stream, int imageFirstPageNumber, int imageLastPageNumber, OcrProgressCallback callback) method.

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.

Note: The value of the "Recognition.ShareOriginalImage" (only supported by the Advantage OCR engine) setting is not used when calling this method. The engine loads the image(s) and sets them in the pages internally. The original image reference can be obtained from the page using IOcrPage.GetRasterImage(OcrPageType.Original). Sharing the original image minimizes the memory used during OCR operations.

Target Platforms

Reference

IOcrPageCollection Interface
IOcrPageCollection Members
Overload List
OcrEngineManager Class
OcrEngineType Enumeration
IOcrPage Interface
Programming with the LEADTOOLS .NET OCR