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LBitmap::PerspectiveDeskew

Summary

Detects and automatically deskews a 3D document image.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::PerspectiveDeskew()

Returns

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

Comments

For the best detection results, the document's boundaries should be inside the captured view and have a different background color than the background of the captured view.

This function can change the specified image. To keep the original image unchanged, use this function on a copy.

Use this function if there is depth (z-axis) deformation as well as deformation along the x- and y- axes. Use the LBitmap::Deskew to fix 2D orientation.

Unlike the LBitmap::Deskew, this function does not look at the content of the captured document.

If the function fails to correct the skew, the original image is not changed.

This function can only process entire images. It does not support regions.

This function supports 24 and 32-bit color images.

Perspective Deskew Function - Before

Perspective Deskew Function - After

View additional platform support for this Perspective Deskew function.

Required DLLs and Libraries

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

Platforms

Win32, x64.

Example

This example loads a bitmap and applies perspective deskew filter.

L_INT LBitmap__PerspectiveDeskewFilterBitmapExample(L_VOID) 
{ 
    L_INT nRet ; 
    LBitmap LeadBitmap ; 
 
    nRet = LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("PerspectiveDeskew.jpg")), 0,ORDER_BGR); 
    if(nRet !=SUCCESS) 
        return nRet; 
 
    /* Apply a perspective deskew filter*/ 
    nRet = LeadBitmap.PerspectiveDeskew(); 
 
    return nRet ; 
}