AutoPreprocess(OcrAutoPreprocessPageCommand,OcrProgressCallback) Method

Summary

Perform auto image processing clean up on all the pages in the OCR document to enhance the quality of the pages before starting its recognition.

Syntax

Objective-C

C++

Java

public void AutoPreprocess( 
   OcrAutoPreprocessPageCommand command, 
   OcrProgressCallback callback 
)

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

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

public void autoPreprocess(OcrAutoPreprocessPageCommand command, 
                           OcrProgressListener callback)

void AutoPreprocess(  
   OcrAutoPreprocessPageCommand command, 
   OcrProgressCallback^ callback 
)

Parameters

command
The preprocessing command to perform.

callback
Optional callback to show operation progress.

Remarks

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).

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.

Example

For an example, refer to IOcrPageCollection.

Requirements

Target Platforms