AutoPreprocess(OcrAutoPreprocessPageCommand,Int32,Int32,OcrProgressCallback) Method

void AutoPreprocess( 
   OcrAutoPreprocessPageCommand command,
   int firstPageIndex,
   int lastPageIndex,
   OcrProgressCallback callback
)

'Declaration
 

Overloads Sub AutoPreprocess( _
   ByVal command As OcrAutoPreprocessPageCommand, _
   ByVal firstPageIndex As Integer, _
   ByVal lastPageIndex As Integer, _
   ByVal callback As OcrProgressCallback _
) 

'Usage
 

Dim instance As IOcrPageCollection
Dim command As OcrAutoPreprocessPageCommand
Dim firstPageIndex As Integer
Dim lastPageIndex As Integer
Dim callback As OcrProgressCallback
 
instance.AutoPreprocess(command, firstPageIndex, lastPageIndex, callback)

void AutoPreprocess( 
   OcrAutoPreprocessPageCommand command,
   int firstPageIndex,
   int lastPageIndex,
   OcrProgressCallback callback
)

- (BOOL)autoPreprocessPages:(LTOcrAutoPreprocessPageCommand)command
                    inRange:(NSRange)range
                   progress:(nullable LTOcrProgressHandler)progressHandler
                      error:(NSError **)error
            

public void autoPreprocess(OcrAutoPreprocessPageCommand command,
                           int firstPageIndex,
                           int lastPageIndex,
                           OcrProgressListener callback)
            

function Leadtools.Forms.Ocr.IOcrPageCollection.AutoPreprocess(OcrAutoPreprocessPageCommand,Int32,Int32,OcrProgressCallback)( 
   command ,
   firstPageIndex ,
   lastPageIndex ,
   callback 
)

void AutoPreprocess( 
   OcrAutoPreprocessPageCommand command,
   int firstPageIndex,
   int lastPageIndex,
   OcrProgressCallback^ callback
) 

Parameters

command

The preprocessing command to perform.

firstPageIndex

The zero-based index of the first page to preprocess.

lastPageIndex

The zero-based index of the last page to preprocess. A value of -1 means preprocess up to and including the last page in the OCR document.

callback

Optional callback to show operation progress.

This method will iterate through pages between firstPageIndex and lastPageIndex 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 on all the pages in the OCR document use AutoPreprocess(OcrAutoPreprocessPageCommand command, OcrProgressCallback callback).

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.

Target Platforms

Reference

IOcrPageCollection Interface
IOcrPageCollection Members
Overload List
IOcrPage.AutoPreprocess
OcrAutoPreprocessPageCommand Enumeration
IOcrPage.GetDeskewAngle
IOcrPage.GetRotateAngle
IOcrPage.IsInverted
Recognize
IOcrPageCollection Interface
IOcrZoneCollection Interface
OcrZone Structure
Programming with the LEADTOOLS .NET OCR