IsInverted Method

bool IsInverted()

'Declaration
 

Function IsInverted() As Boolean

'Usage
 

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

bool IsInverted()

- (BOOL)isInverted:(NSError **)error

public boolean 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. 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.

Use GetPreprocessValues to obtain the accumulative pre-processing values applied to this IOcrPage.

Target Platforms

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