public bool IsInverted()
Function IsInverted() As Boolean
- (BOOL)isInverted:(NSError **)error
public boolean isInverted()
true if this IOcrPage is inverted; otherwise, false.
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.
For an example, refer to AutoPreprocess.
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