L_OcrPage_GetRotateAngle

#include "ltocr.h"

L_LTOCR_API L_INT EXT_FUNCTION L_OcrPage_GetRotateAngle(page, value, confidence)

L_OcrPage page; handle to the OCR page
L_INT* value; address to L_INT variable to be updated with the page rotation angle
L_INT* confidence; address to L_INT variable to be updated with the rotation angle detection confidence

Gets the angle of the rotation of this L_OcrPage in degrees.

Parameter Description
page Handle to the OCR page.
value Address to L_INT variable to be updated with the page rotation angle.
confidence Address to L_INT variable to be updated with the rotation angle detection confidence.

Returns

SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.

Comments

Gets the angle of the rotation of this L_OcrPage in degrees.

This method will return one of the following values:

Value Description
0 The bitmap is not rotated
90 The bitmap is rotated 90 degrees.
180 The bitmap is rotated 180 degrees.
270 The bitmap is rotated 270 degrees.

Use L_OcrPage_AutoPreprocess with L_OcrAutoPreprocessPageCommands_Rotate to automatically rotate the page bitmap prior to calling L_OcrPage_Recognize. This could enhance the quality of the image before starting its recognition.

If the bitmap is rotated, L_OcrPage_GetRotateAngle will return the angle required to fix the orientation of the page, if you call L_OcrPage_AutoPreprocess on the page, all subsequent calls to L_OcrPage_GetRotateAngle will return 0 since the bitmap is not rotated. Hence, you must use L_OcrPage_GetRotateAngle before calling L_OcrPage_AutoPreprocess.

Use L_OcrPage_GetAutoPreprocessValues to obtain the accumulative pre-processing values applied to this L_OcrPage.

Required DLLs and Libraries

LTOCR
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.
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