Leadtools.Forms.Ocr Namespace > IOcrPage Interface : GetRotateAngle Method |
int GetRotateAngle()
'Declaration Function GetRotateAngle() As Integer
int GetRotateAngle()
- (int)getRotateAngle:(NSError**)outError;
public int getRotateAngle()
function Leadtools.Forms.Ocr.IOcrPage.GetRotateAngle()
int GetRotateAngle();
This method will return one of the following values:
Value | Description |
---|---|
0 | The image is not rotated. |
90 | The image is rotated 90 degrees. |
180 | The image is rotated 180 degrees (upside down). |
270 | The image is rotated 270 degrees. |
Use AutoPreprocess with OcrAutoPreprocessPageCommand.Rotate to automatically rotate 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 rotated, GetRotateAngle will return the angle required to fix the orientation of the page, if you call AutoPreprocess on the page, all subsequent calls to GetRotateAngle will return 0 since the image is no rotated. Hence, you must use GetRotateAngle before calling AutoPreprocess.