Automatically splits document images that have two pages inside it.
#include "Ltimgcor.h"
L_LTIMGCOR_API L_INT L_AutoPageSplitter(pBitmap, pOutBitmap, SplittingCoord)
Pointer to the bitmap handle referencing the bitmap to be splitted.
Pointer to a BITMAPHANDLE[2] array. The first element will be filled with the left page, and the second element with the right page.
Pointer to a L_UINT variable that will be filled with the column number of the splitting point.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
Finds and splits a two-page document that has its pages horizontally side-by-side.
The two new bitmaps have the same dimensions as the original.
The new bitmaps are returned as 1-bit bitmaps.
This function can only process entire images. It does not support regions.
This function supports 24- and 36-bit color images and 8-bit grayscale images.
Win32, x64, Linux.
This example loads a two pages bitmap and applies the following filter to enhance document quality :-
1- Remove border
2- Split pages in bitmap
3- Expand the content of the page
L_INT AutoPageSplitterExample(L_VOID)
{
L_INT nRet;
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */
/* Load the bitmap, keeping the bits per pixel of the file */
nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("ScannedBook.jpg")), &LeadBitmap, sizeof(BITMAPHANDLE), 1, ORDER_BGR, NULL, NULL);
if (nRet != SUCCESS)
return nRet;
BORDERREMOVE br;
br.uStructSize = sizeof(BORDERREMOVE);
br.iBorderPercent = 20;
br.iVariance = 2;
br.iWhiteNoiseLength = 5;
br.uBorderToRemove = BORDER_TOP | BORDER_BOTTOM | BORDER_LEFT | BORDER_RIGHT;
br.uFlags = BORDER_CALLBACK_REGION | BORDER_USE_VARIANCE;
br.pBitmapRegion = &LeadBitmap;
br.uBitmapStructSize = sizeof(BITMAPHANDLE);
/* Apply border remove filter to clean up black borders*/
nRet = L_BorderRemoveBitmap(&LeadBitmap, &br, NULL, NULL, 0);
if (nRet != SUCCESS)
{
if (LeadBitmap.Flags.Allocated)
L_FreeBitmap(&LeadBitmap);
return nRet;
}
/* Apply Page splitter*/
BITMAPHANDLE OutBitmap[2];
OutBitmap[0].Flags.Allocated = 0;
OutBitmap[1].Flags.Allocated = 0;
L_UINT SplitterCoordinates = 0;
nRet = L_AutoPageSplitter(&LeadBitmap, OutBitmap, &SplitterCoordinates);
if (nRet != SUCCESS)
{
if (LeadBitmap.Flags.Allocated)
L_FreeBitmap(&LeadBitmap);
return nRet;
}
nRet = L_ExpandPage(&(OutBitmap[0]));
if (nRet == SUCCESS)
nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result_BorderRemove.BMP")), &(OutBitmap[0]), FILE_BMP, 24, 0, NULL);
if (OutBitmap[0].Flags.Allocated)
L_FreeBitmap(&OutBitmap[0]);
if (OutBitmap[1].Flags.Allocated)
L_FreeBitmap(&OutBitmap[1]);
if (LeadBitmap.Flags.Allocated)
L_FreeBitmap(&LeadBitmap);
return nRet;
}
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