Overloads Overridable Sub AutoPreprocess( _
   ByVal command As OcrAutoPreprocessPageCommand, _
   ByVal callback As OcrProgressCallback _
) 

Visual Basic (Usage)	Copy Code
Dim instance As IOcrPageCollection Dim command As OcrAutoPreprocessPageCommand Dim callback As OcrProgressCallback   instance.AutoPreprocess(command, callback)

virtual void AutoPreprocess( 
   OcrAutoPreprocessPageCommand command,
   OcrProgressCallback callback
)

virtual void AutoPreprocess( 
   OcrAutoPreprocessPageCommand command,
   OcrProgressCallback^ callback
) 

Parameters

command

The preprocessing command to perform.

callback

Optional callback to show operation progress.

This method will iterate through all the pages in this OCR document and run IOcrPage.AutoPreprocess on each page.

You can use this method to deskew, rotate or invert the image according to command. By performing auto pre-processing on the page, you can improve the image quality of draft mode faxes.

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

You should call this method prior to calling Recognize.

To perform auto-preprocessing to a range of pages in the OCR document use AutoPreprocess(OcrAutoPreprocessPageCommand command, int firstPageIndex, int lastPageIndex, OcrProgressCallback callback).

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference