foxit::addon::ocr::OCRCallback Class Reference

Public Member Functions
virtual bool	IsImageIgnored (foxit::pdf::graphics::ImageObject *image_object)=0
	A callback function used to determine whether an image object should be excluded from OCR text recognition. More...
virtual bool	NeedToCancelNow (const wchar_t *info)=0
	A callback function used to cancel current OCR progress. More...

Detailed Description

This class represents a callback object to cancel OCR progress. All the pure virtual functions in this class are used as callback functions and should be implemented by user. An implemented OCRCallback object can be set by function OCREngine::SetOCRCallback.

Member Function Documentation

IsImageIgnored()

virtual bool foxit::addon::ocr::OCRCallback::IsImageIgnored ( foxit::pdf::graphics::ImageObject *  image_object )

pure virtual

A callback function used to determine whether an image object should be excluded from OCR text recognition.

Parameters

[in]

image_object

A pointer to an pdf::graphics::ImageObject object.

Returns

true means to ignore the image object during OCR processing, the image will not be processed by the OCR engine for text extraction, but the image itself remains in the output document, while false means not.

NeedToCancelNow()

virtual bool foxit::addon::ocr::OCRCallback::NeedToCancelNow ( const wchar_t *  info )

pure virtual

A callback function used to cancel current OCR progress.

This function cannot be used to cancel OCR conversion.

Parameters

[in]

info

A string that describes the OCR progress information.

Returns

true means to cancel progress, while false means not.