L_OcrPage_AutoZone

void ShowZones(L_TCHAR* message, L_OcrPage ocrPage) 
{ 
   L_UINT count = 0; 
   L_OcrPage_GetZoneCount(ocrPage, &count); 
 
   if(count < 1) 
   { 
      std::cout << "No Zone information exists to output.\n"; 
      return; 
   } 
 
   std::wcout << message << L":\n" << "----------------------------------\n"; 
   for(L_UINT index = 0; index < count; index++) 
   { 
      L_OcrZone ocrZone; 
      ocrZone.StructSize = sizeof(L_OcrZone); 
      L_OcrPage_GetZoneAt(ocrPage, index, &ocrZone); 
      std::cout << "Zone index: " << index << std::endl; 
      std::cout << "  Id                  " << ocrZone.Id << std::endl; 
      std::cout << "  Bounds              (" << ocrZone.Bounds.left << ","  
         << ocrZone.Bounds.top << ","  
         << ocrZone.Bounds.right << ","  
         << ocrZone.Bounds.bottom << ")\n"; 
      std::cout << "  ZoneType            " << ocrZone.ZoneType << std::endl; 
      std::cout << "  CharacterFilters:   " << ocrZone.CharacterFilters << std::endl; 
      std::cout << "----------------------------------\n"; 
   } 
} 
 
L_INT L_OcrPage_AutoZoneExample() 
{ 
   L_INT retCode = -1; 
   BITMAPHANDLE bitmap = { 0 }; 
   L_OcrEngine ocrEngine = NULL; 
   L_OcrPage ocrPage = NULL; 
   L_OcrZone ocrZone = { 0 }; 
   L_OcrWriteXmlOptions xmlWriteOptions = { 0 }; 
 
   // Create an image with some text in it 
   L_CreateBitmap(&bitmap, sizeof(BITMAPHANDLE), TYPE_CONV, 320, 200, 24, ORDER_BGR, NULL, TOP_LEFT, NULL, 0); 
 
   // Create a device context to write with 
   L_HDC LeadDC = L_CreateLeadDC(&bitmap); 
   L_INT StartGDIX = 0,   /* Drawing coordinates */ 
      StartGDIY = 0, 
      EndGDIX = BITMAPWIDTH(&bitmap),  
      EndGDIY = BITMAPHEIGHT(&bitmap);  
 
   if(LeadDC != NULL) 
   { 
      // Correct viewer coordinates if necessary 
      if (bitmap.ViewPerspective != TOP_LEFT) 
      { 
         L_PointToBitmap ( &bitmap, TOP_LEFT, & StartGDIX, & StartGDIY ); 
         L_PointToBitmap ( &bitmap, TOP_LEFT, & EndGDIX, & EndGDIY ); 
      } 
 
      SelectObject(LeadDC, GetStockObject(WHITE_PEN)); 
      SelectObject(LeadDC, GetStockObject(NULL_BRUSH)); 
      RECT drawArea; 
      SetRect(&drawArea, StartGDIX, StartGDIY, EndGDIX, EndGDIY); 
 
      // Make the image white 
      FillRect(LeadDC, &drawArea, CreateSolidBrush(RGB(255,255,255))); 
 
      // Now write some text 
      SetRect(&drawArea, 0, 0, 100, 20); 
      int numChars = 11; 
      DrawText(LeadDC, TEXT("Normal line"), numChars, &drawArea, DT_TOP | DT_LEFT); 
 
      // Write a second line 
      SetRect(&drawArea, 0, 80, 120, 100); 
      numChars = 15; 
      DrawText(LeadDC, TEXT("Monospaced line"), numChars, &drawArea, DT_TOP | DT_LEFT); 
   } 
 
   // We don't need this context anymore, so free it 
   L_DeleteLeadDC(LeadDC); 
 
   // Create an instance of the OCR engine 
   retCode = L_OcrEngineManager_CreateEngine(L_OcrEngineType_LEAD, &ocrEngine); 
   if(retCode != SUCCESS) 
      return retCode; 
 
   // Start the engine using default parameters 
   std::cout << "Starting up the engine...\n"; 
   retCode = L_OcrEngine_Startup(ocrEngine, NULL, OCR_LEAD_RUNTIME_DIR); 
   if(retCode == SUCCESS) 
   { 
      // Add image to an OcrPage 
      L_OcrPage_FromBitmap(ocrEngine, &ocrPage, &bitmap, L_OcrBitmapSharingMode_AutoFree, NULL, NULL); 
 
      // Transfer ownership to OCR page 
      bitmap.Flags.Allocated = 0; 
 
      // Show the zones, there should be no zones yet 
      ShowZones(L_TEXT("Right after the page was created"), ocrPage); 
 
      // Perform default AutoZoning on the page 
      L_OcrPage_AutoZone(ocrPage, NULL, NULL); 
 
      // Show the zones, there should be two zones, one for each line 
      ShowZones(L_TEXT("AutoZone with default parameters"), ocrPage); 
 
      //   // Update the first zone manually 
      ocrZone.StructSize = sizeof(L_OcrZone); 
      L_OcrPage_GetZoneAt(ocrPage, 0, &ocrZone); 
 
      // Set it to be a text zone 
      ocrZone.ZoneType = L_OcrZoneType_Text; 
 
      // Update the zone in the page 
      L_OcrPage_SetZoneAt(ocrPage, 0, &ocrZone); 
 
      // Show the zones 
      ShowZones(L_TEXT("\n\nAfter updating the type of the first zone"), ocrPage); 
 
      // Save the zones to a file and then clear them 
      xmlWriteOptions.StructSize = sizeof(L_OcrWriteXmlOptions); 
      xmlWriteOptions.Formatted = true; 
      xmlWriteOptions.Encoding = L_OcrXmlEncoding_UTF8; 
      wcscpy_s(xmlWriteOptions.Indent, L_TEXT("   ")); 
 
      // Output created zones to a file 
      L_OcrPage_SaveZonesFile(ocrPage, MAKE_IMAGE_PATH(L_TEXT("MyZones.xml")), 1, &xmlWriteOptions); 
 
      // Remove prior created zones 
      L_OcrPage_ClearZones(ocrPage); 
 
      // Show the zones, there should be no zones since we just cleared them 
      ShowZones(L_TEXT("\n\nAfter calling save and clear"), ocrPage); 
 
      // Re-load the zones 
      retCode = L_OcrPage_LoadZonesFile(ocrPage, MAKE_IMAGE_PATH(L_TEXT("MyZones.xml")), 1); 
      if(retCode != SUCCESS) 
         return retCode; 
 
      // Show the zone info again 
      ShowZones(L_TEXT("\n\nAfter re-loading the zones"), ocrPage); 
   } 
 
   //CLEANUP 
   if(bitmap.Flags.Allocated) 
      L_FreeBitmap(&bitmap); 
 
   if(ocrPage != NULL) 
      L_OcrPage_Destroy(ocrPage); 
 
   if(ocrEngine != NULL) 
      L_OcrEngine_Destroy(ocrEngine); 
 
   return SUCCESS; 
}