IsInverted Method

bool IsInverted()

'Declaration
 
Function IsInverted() As Boolean

'Usage
 
Dim instance As IOcrPage
Dim value As Boolean
 
value = instance.IsInverted()

bool IsInverted()

function Leadtools.Forms.Ocr.IOcrPage.IsInverted()

bool IsInverted(); 

Return Value

You can use this method to detect if the page is inverted (has white text over black background). This method will work on the processing version of the image inside the page (OcrPageType.Processing).

Use AutoPreprocess with OcrAutoPreprocessPageCommand.Invert to automatically invert the page image prior to calling Recognize or RecognizeText. This could enhance the quality of the image before starting its recognition.

If the image is inverted, IsInverted will return true, if you call AutoPreprocess on the page, all subsequent calls to IsInverted will return false since the image is no inverted. Hence, you must use IsInverted before calling AutoPreprocess.

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

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