LEADTOOLS OCR (Leadtools.Forms.Ocr assembly)

GetRotateAngle Method

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Gets the angle of the rotation of this IOcrPage.
Syntax
int GetRotateAngle()
'Declaration
 
Function GetRotateAngle() As Integer
'Usage
 
Dim instance As IOcrPage
Dim value As Integer
 
value = instance.GetRotateAngle()
int GetRotateAngle()
- (int)getRotateAngle:(NSError**)outError;
public int getRotateAngle()
function Leadtools.Forms.Ocr.IOcrPage.GetRotateAngle()
int GetRotateAngle(); 

Return Value

The angle of the rotation of this image in degrees.
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 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.

Example
For an example, refer to AutoPreprocess.
Requirements

Target Platforms

See Also

Reference

IOcrPage Interface
IOcrPage Members
AutoPreprocess Method
GetDeskewAngle Method
IsInverted Method
Recognize Method
OcrAutoPreprocessPageCommand Enumeration
IOcrPageCollection Interface
IOcrZoneCollection Interface
OcrZone Structure
Programming with the LEADTOOLS .NET OCR

 

 


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GetRotateAngle requires an OCR module license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features