L_Doc2AddZoneRect

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#include "ltdoc2.h"

L_LTDOC2_API L_INT EXT_FUNCTION L_Doc2AddZoneRect(hDoc, nPageIndex, nZoneIndex, prc)

L_HDOC2 hDoc;	/* handle to the OCR document */
L_INT nPageIndex;	/* page index */
L_INT nZoneIndex;	/* zone index */
RECT * prc;	/* pointer to RECT structure */

Adding a rectangle to a user zone.

Parameter	Description
hDoc	Handle to the OCR document. This handle is obtained by calling the L_Doc2StartUp function.
nPageIndex	Specifies the index of the page. This is a zero-based index.
nZoneIndex	Specifies the index of the zone. This is a zero-based index.
prc	Pointer to RECT structure to be added to specified zone.

Returns

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

Comments

This function will insert a new rectangle into the specified zone. The zone will be irregular and formed from a union of rectangles. This is called a pizzabox shape.

A pizzabox shape is a union of rectangles, where the top of each rectangle in the union must touch the bottom of the rectangle above it. A rectangle can touch at most one rectangle above and one below. The following zones cannot have a pizzabox shape:

Table zones (must be rectangular)
OMR zone (can contain non-touching rectangles)

Before inserting a new rectangle, you must add the zone to the user zone list by calling the L_Doc2AddZone function.

Because the OCR engine does not support overlapping user zones, the newly added rectangle must be disjointed from the other zones.

Required DLLs and Libraries

LTDOC2

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

See Also

Functions:	L_Doc2AddZone, L_Doc2UpdateZone, L_Doc2GetZoneCount, L_Doc2GetZone, L_Doc2RemoveZone, L_Doc2ImportZones, L_Doc2ExportZones, L_Doc2FindZones, L_Doc2SetZoneOptions, L_Doc2GetZoneOptions, L_Doc2GetZoneColor, L_Doc2GetZoneLayout, L_Doc2GetZoneNodes, L_Doc2ExcludeZoneRect, L_Doc2SetZoneLayout
Topics:	Working with Zones

Example

L_LTDOC2TEX_API  L_INT Doc2AddZoneRectExample(L_HDOC2 hDoc, L_INT nPageIndex)
{
   L_INT nRet;
   ZONEDATA2 ZoneData;

   memset(&ZoneData, 0, sizeof(ZONEDATA2));

   ZoneData.uStructSize = sizeof(ZONEDATA2);
   ZoneData.rcArea.left = 100;
   ZoneData.rcArea.top = 100;
   ZoneData.rcArea.right = 200;
   ZoneData.rcArea.bottom = 200;
   ZoneData.FillMethod = DOC2_FILL_DEFAULT;
   ZoneData.RecogModule = DOC2_RECOGMODULE_AUTO;
   ZoneData.CharFilter = DOC2_ZONE_CHAR_FILTER_DEFAULT;
   ZoneData.Type = DOC2_ZONE_FLOWTEXT;

   nRet = L_Doc2AddZone(hDoc, nPageIndex, 0, &ZoneData);
   if (nRet != SUCCESS)
      return nRet;

   RECT rc;
   rc.left = 70;
   rc.top = 70;
   rc.right = 130;
   rc.bottom = 130;
   nRet = L_Doc2AddZoneRect(hDoc, nPageIndex, 0, &rc);
   if (nRet == SUCCESS)
      MessageBox(NULL, TEXT("The rectangle is added to specific zone."), TEXT("Notice!"), MB_OK);

   // recongize the page...
   // save the recognition results...

   nRet = L_Doc2ExcludeZoneRect(hDoc, nPageIndex, 0, &rc);
   if (nRet == SUCCESS)
      MessageBox(NULL, TEXT("The rectangle is subtracted from specific zone."), TEXT("Notice!"), MB_OK);

   // recongize the page...
   // save the recognition results...
   // ...

   return SUCCESS;
}