The GetRotateAngle Method is available as an add-on to the LEADTOOLS Document and Medical Imaging toolkits.
Gets the angle of the rotation of this IOcrPage.
Syntax
| Visual Basic (Declaration) | |
|---|---|
Function GetRotateAngle() As Integer | |
| Visual Basic (Usage) |  Copy Code |
|---|---|
Dim instance As IOcrPage Dim value As Integer value = instance.GetRotateAngle() | |
| C# | |
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int GetRotateAngle() | |
| C++/CLI | |
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int GetRotateAngle(); | |
Return Value
The angle of the rotation of this image in degrees.Example
Remarks
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 IOcrPage.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.
Requirements
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7