L_BarCodeIsDuplicated

#include "ltbar.h"

L_LTBAR_API L_BOOL L_BarCodeIsDuplicated(pBarCodeDataItem)

Returns a value that indicates whether the specified barcode is duplicated or not.

Returns

Comments

This function determines if a barcode is duplicated in another location in the bitmap.

LEADTOOLS provides a number of functions to let you work with duplicated barcodes. They let you:

• Find the number of duplicates of a specific barcode

• Determine whether a specific barcode is duplicated

• Get the index of the first duplicated barcode

• Get the index of a subsequent barcode

To determine whether a barcode is duplicated, use the L_BarCodeIsDuplicated function. If a barcode is duplicated, L_BarCodeGetDuplicated will return the index of the first barcode in the array after the specified barcode, which is a duplicate of the specified barcode.

If you know the index of a barcode within an array, you can get the index of the first duplicate of the specified barcode using L_BarCodeGetFirstDuplicated. Use the L_BarCodeGetNextDuplicated to get the next instance of a duplicated barcode.

To find out how many sets of barcodes are duplicated, use the following:

int GetSetsCount(pBARCODEDATA   pBarCodeData)

{

   L_INT i, j, nCount;

   L_BOOL * pbVisited = (L_BOOL *)malloc(pBarCodeData->nTotalCount*sizeof(L_BOOL));

   memset(pbVisited, 0, pBarCodeData->nTotalCount*sizeof(L_BOOL));

   nCount = 0;

   for (i=0; i<pBarCodeData->nTotalCount; i++)

   {

      if(pbVisited[i])

         continue;

      pbVisited[i] = TRUE;

      nCount++;

      j = i;

      while(pBarCodeData[j].nIndexDuplicate != -1 &&

            pBarCodeData[j].nIndexDuplicate != 255)

      {

         j = pBarCodeData[j].nIndexDuplicate;

         pbVisited[j] = TRUE;

      }

   }

   free(pbVisited);

   return nCount;

}

For example, in an array of ten barcodes, the first, third, and fifth might be duplicates of each other, while the 4th, 8th and 9th are duplicates of a different barcode. After this code is executed, nCount will contain the number of different sets of barcodes.

To read in barcodes present in a bitmap, use the L_BarCodeRead function. Any item in the barcode array returned by L_BarCodeRead can be passed to L_BarCodeIsDuplicated.

Required DLLs and Libraries

See Also

Example

For an example, refer to L_BarCodeGetDuplicated.