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IsInverted Method

Summary
Gets a value that indicate whether this IOcrPage is inverted.
Syntax
C#
VB
Objective-C
C++
Java
public bool IsInverted() 
Function IsInverted() As Boolean 
- (BOOL)isInverted:(NSError **)error 
public boolean isInverted() 
bool IsInverted();

Return Value

true if this IOcrPage is inverted; otherwise, false.

Remarks

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.

Example

For an example, refer to AutoPreprocess.

Requirements

Target Platforms

Help Version 21.0.2021.7.2
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