Recognize Pages Using LEADTOOLS OCR Module - LEAD Engine

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

1. Start with the program you created in Working with Pages Using LEADTOOLS OCR Module - LEAD Engine.

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

   #define IDM_RECOGNIZE               205   
   #define IDM_GET_STATUS              206 

3. Edit EZFUNC.RC file in the OCR_Ltocr 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: 
   { 
      L_OcrLanguageManager languageManager = NULL; 
      L_OcrEngine_GetLanguageManager(hEngine, languageManager); 
      L_OcrLanguage langs[] = { L_OcrLanguage_EN }; 
      nRet = L_OcrLanguageManager_EnableLanguages(languageManager, langs, _countof(langs)); 
      if(nRet != SUCCESS) 
      { 
         wsprintf (achBuff, TEXT("Error %d enabling recognition language(s)"), nRet); 
         MessageBox(NULL, achBuff, TEXT("Error!"), MB_OK); 
         return 0; 
      } 
      nRet = L_OcrPage_Recognize(hPage, MyCallback, NULL); 
      if (nRet == SUCCESS) 
         MessageBox(NULL, TEXT("The engine finished recognizing OCR page successfully."), TEXT("Notice"), MB_OK); 
      else 
      { 
         wsprintf (achBuff, TEXT("Error %d while recognizing OCR page"), nRet); 
         MessageBox (NULL, achBuff, TEXT("Error"), MB_OK); 
      } 
   } 
   break; 
   case IDM_GET_STATUS: 
   { 
      L_OcrRecognizeStatistic statistics; 
      memset(&statistics, 0, sizeof(L_OcrRecognizeStatistic)); 
      statistics.StructSize = sizeof(L_OcrRecognizeStatistic); 
      nRet = L_OcrPage_GetRecognizeStatistics(hPage, &statistics); 
      if (nRet == SUCCESS) 
      { 
         wsprintf(achBuff, TEXT("Total Recognized Characters = %d\nTotal Recognized Words = %d\nTotal Rejected Characters = %d\n "), 
         statistics.RecognizedCharacters, 
         statistics.RecognizedWords, 
         statistics.RejectedCharacters); 
         MessageBox(NULL, achBuff, TEXT("Status..."), MB_OK); 
      } 
   } 
   break; 

5. Add below callback code above the function MainWndProc:

   L_INT EXT_CALLBACK MyCallback(L_OcrProgressData* data, L_VOID* userData) 
   { 
      UNREFERENCED_PARAMETER(userData); 
      L_TCHAR szBuffer[1024] = {0}; 
      L_TCHAR szOperation[100] = {0}; 
      switch(data->Operation) 
      { 
         case L_OcrProgressOperation_AutoZone: 
         lstrcpy(szOperation, TEXT("Auto Zone")); 
         break; 
         case L_OcrProgressOperation_PreprocessImage: 
         lstrcpy(szOperation, TEXT("Pre-process Image")); 
         break; 
         case L_OcrProgressOperation_Recognize: 
         lstrcpy(szOperation, TEXT("Recognize")); 
         break; 
         case L_OcrProgressOperation_SaveDocumentPrepare: 
         lstrcpy(szOperation, TEXT("Save Document Prepare")); 
         break; 
         case L_OcrProgressOperation_SaveDocument: 
         lstrcpy(szOperation, TEXT("Save Document")); 
         break; 
      } 
      wsprintf(szBuffer, TEXT("Recognizing page # %d, Operation: %s, Percentage: %d\n"), data->CurrentPageIndex, szOperation, data->Percentage); 
      OutputDebugString(szBuffer); 
      return SUCCESS; // continue to recognize next page 
   } 

6. Build SimpleLoad.exe.

7. Run SimpleLoad.exe.