To add code to an existing project that will let you recognize pages:
Start with the program you created in Working with Pages.
Define the following global IDs in Ezfunc.h in the OCR_Ltdoc2 directory:
#define IDM_FIND_ZONES 201
#define IDM_ZONES_COUNT 202
#define IDM_ADD_VERIFICATION_ZONE 203
Edit EZFUNC.RC file in the OCR_Ltdoc2 directory and add the following lines:
MAIN_MENU MENU
BEGIN
...
...
MENUITEM "Find Zones" IDM_FIND_ZONES
MENUITEM "Zone Count" IDM_ZONES_COUNT
MENUITEM "Add Verification Zone" IDM_ADD_VERIFICATION_ZONE
END
Define the following global variables in Ezfunc.H in the OCR_Ltdoc2 directory:
L_INT nZoneCount;
In Ezfunc.cpp in the MainWndProc procedure, add the following code to the switch ("switch(LOWORD(wParam))") statement for WM_COMMAND:
case IDM_FIND_ZONES:
{
AUTOZONEOPTS2 ZoneOpts;
memset(&ZoneOpts, 0, sizeof(AUTOZONEOPTS2));
ZoneOpts.uStructSize = sizeof(AUTOZONEOPTS2);
ZoneOpts.bEnableForceSingleColumn = TRUE;
ZoneOpts.bDetectNonGridedTables = TRUE;
L_Doc2SetZoneOptions(hDoc, &ZoneOpts);
nRet = L_Doc2FindZones(hDoc, 0);
if (nRet == SUCCESS)
MessageBox(NULL, TEXT("The automatic zone method found all available zones in the specified pages successfully."), TEXT("Notice!"), MB_OK);
else
{
wsprintf (achBuff, TEXT("Error %d in finding available zones in the specified page."), nRet);
MessageBox (NULL, achBuff, TEXT("Error"), MB_OK);
}
// Now the engine will build the OCR zone list, and we need to specify a verification event for each zone
// but the engine allows adding a verification event only for user zones. So, we need to duplicate these zones in the same coordinates...
DuplicateOcrZones(0);
InvalidateRect (hWnd, NULL, FALSE);
}
break;
case IDM_ZONES_COUNT:
{
nRet = L_Doc2GetZoneCount(hDoc, 0, &nZoneCount);
if (nRet == SUCCESS)
{
wsprintf(achBuff, TEXT("Total Zones count = %d\n"), nZoneCount);
MessageBox(NULL, achBuff, TEXT("Zones Count"), MB_OK);
}
}
break;
case IDM_ADD_VERIFICATION_ZONE:
{
ZONEDATA2 Zone;
L_INT i;
for(i=0; i<nZoneCount; i++)
{
memset(&Zone, 0, sizeof(ZONEDATA2));
nRet = L_Doc2GetZone(hDoc, 0, i, &Zone, sizeof(ZONEDATA2));
if (nRet == SUCCESS)
{
if ((Zone.uFlags & DOC2_ZONE_CHK_CHECKCBF_PROHIBIT) == DOC2_ZONE_CHK_CHECKCBF_PROHIBIT)
Zone.uFlags &= ~ DOC2_ZONE_CHK_CHECKCBF_PROHIBIT;
Zone.pfnCallback = VerificationCB;
nRet = L_Doc2UpdateZone(hDoc, 0, i, &Zone);
if (nRet != SUCCESS)
{
wsprintf (achBuff, TEXT("Error %d in updating zone # %d"), nRet, i);
MessageBox (NULL, achBuff, TEXT("Error"), MB_OK);
}
}
}
}
break;
Add the following function at the end of the file in EZFUNC.CPP in the OCR_Ltdoc2 directory.
L_INT EXT_CALLBACK VerificationCB(L_INT nZoneIndex, L_TCHAR * pszWord, DOC2_VERIFYCODE * pVerify, L_VOID * pUserData)
{
UNREFERENCED_PARAMETER(nZoneIndex);
UNREFERENCED_PARAMETER(pszWord);
UNREFERENCED_PARAMETER(pUserData);
*pVerify = DOC2_VERIFY_ACCEPT;
return SUCCESS;
}
Also, add the following statement before the MainWndProc function.
L_INT EXT_CALLBACK VerificationCB(L_INT nZoneIndex, L_TCHAR * pszWord, DOC2_VERIFYCODE * pVerify, L_VOID * pUserData);
Add the following at the end of the code in EZFUNC.CPP in the OCR_Ltdoc2 directory:
L_INT DuplicateOcrZones(L_INT nPageIndex)
{
L_INT nOcrCount=0;
L_Doc2GetZoneCount(hDoc, nPageIndex, &nOcrZonesCount);
pZONEDATA2 pZones = (pZONEDATA2)GlobalAllocPtr(GHND, sizeof(ZONEDATA2) * nOcrZonesCount);
if (!pZones)
return ERROR_NO_MEMORY;
L_INT nRet;
for (int i=0; i<nOcrZonesCount; i++)
{
nRet = L_Doc2GetZone(hDoc, nPageIndex, i, &pZones[i], sizeof(ZONEDATA2));
if (nRet != SUCCESS)
return nRet;
}
for (int i=0; i<nOcrZonesCount; i++)
L_Doc2AddZone(hDoc, nPageIndex, -1, &pZones[i]);
return SUCCESS;
}
Also, add the following statement before the MainWndProc function.
L_INT DuplicateOcrZones(L_INT nPageIndex);
Build SimpleLoad.exe.
Run SimpleLoad.exe.