Recognize Pages Using LEADTOOLS OCR Module - OmniPage Engine

To add code to an existing project in order to recognize pages:

1. Start with the program you created in Working with Zones.

2. Define the following global IDs in Ezfunc.h in the OCR_Ltdoc2 directory:

   #define IDM_RECOGNIZE               205 
   #define IDM_GET_STATUS              206 

3. Edit EZFUNC.RC file in the OCR_Ltdoc2 directory and add the following lines:

   MAIN_MENU   MENU 
   BEGIN 
      ... 
      ... 
      MENUITEM "Recognize Page"        IDM_RECOGNIZE 
      MENUITEM "Engine Status"         IDM_GET_STATUS 
   END 

4. In Ezfunc.cpp in the MainWndProc procedure, add the following code to the switch statement (switch(LOWORD(wParam))) for WM_COMMAND:

   case IDM_RECOGNIZE: 
   { 
      RECOGNIZEOPTS2 RecogOpts; 
      memset(&RecogOpts, 0, sizeof(RECOGNIZEOPTS2)); 
      RecogOpts.uStructSize = sizeof(RECOGNIZEOPTS2); 
      RecogOpts.nPageIndexStart = 0; 
      RecogOpts.nPagesCount = 1; 
      RecogOpts.SpellLangId = DOC2_LANG_ID_ENGLISH; 
      RecogOpts.bEnableSubSystem = TRUE; 
      RecogOpts.bEnableCorrection = TRUE; 
      nRet = L_Doc2Recognize(hDoc, &RecogOpts, RecognizeStatusCB, NULL); 
      if (nRet == SUCCESS) 
         MessageBox(NULL, TEXT("The engine finished recognizing the specified pages successfully."), TEXT("Notice"), MB_OK); 
      else 
      { 
         wsprintf (achBuff, TEXT("Error %d in recognized pages"), nRet); 
         MessageBox (NULL, achBuff, TEXT("Error"), MB_OK); 
      } 
   } 
   break; 
    
   case IDM_GET_STATUS: 
   { 
      STATUS2 Status; 
      memset(&Status, 0, sizeof(STATUS2)); 
      nRet = L_Doc2GetStatus(hDoc, &Status, sizeof(STATUS2)); 
      if (nRet == SUCCESS) 
      { 
         wsprintf(achBuff, TEXT("Recognition Time = %d\nTotal Recognized Characters = %d\nTotal Recognized Words = %d\nTotal Rejected Characters = %d\n "), 
         Status.lRecogTime, 
         Status.nRecogChrCount, 
         Status.nRecogWordCount, 
         Status.nRejectChrCount); 
         MessageBox(NULL, achBuff, TEXT("Status..."), MB_OK); 
      } 
   } 
   break; 

5. Add at the end of the code the following function in EZFUNC.CPP in OCR_Ltdoc2 directory.

   L_INT EXT_CALLBACK RecognizeStatusCB(L_INT nRecogPage, L_INT nError, L_VOID * pUserData) 
   { 
      UNREFERENCED_PARAMETER(pUserData); 
      L_TCHAR szBuffer[1024]; 
      wsprintf(szBuffer, TEXT("Page # %d has finished recognition.\nThe recognition return code = %d\n"), nRecogPage, nError); 
      MessageBox(NULL, szBuffer, TEXT("Recognition Status"), MB_OK); 
      return SUCCESS; // continue to recognize next page 
   } 

6. Also, add the following statement before the MainWndProc function

   L_INT EXT_CALLBACK RecognizeStatusCB(L_INT nRecogPage, L_INT nError, L_VOID * pUserData); 

7. Build SimpleLoad.exe.

8. Run SimpleLoad.exe.