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OCR Plus Utility Demo

The following steps demonstrate a full example on how to use the LEADTOOLS OCR Utility demo, and how these steps are coded into an application:

1.	Run the OCR Utility demo after the LEADTOOLS v16 with document support installation.
2.	Startup the OCR engine.
	Using OCR Utility demo:
	From "Engine" menu select "Start up".
	Or;
	Using the following code:

 

   L_HDOC hDoc = NULL;
   L_DocStartUp(&hDoc, NULL);

3.	Load an image (e.g. OCR1.TIF).
	Using OCR Utility demo:
	From "File" menu select "Open". The Open dialog will appear, then select the file and press "Open".
	Or;
	Using the following code:

 

   BITMAPHANDLE Bitmap;
   LOADFILEOPTION LoadOptions;
   memset(&Bitmap, 0, sizeof(BITMAPHANDLE));
   memset(&LoadOptions, 0, sizeof(LOADFILEOPTION));

   L_GetDefaultLoadFileOption(&LoadOptions, sizeof(LOADFILEOPTION));
   L_LoadBitmap(TEXT(MAKE_IMAGE_PATH(TEXT("OCR1.TIF")), &Bitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, &LoadOptions, NULL);

4.	Insert the loaded image to the end of the OCR document.
	Using OCR Utility demo:
	From "Page" menu select "Insert Current Image".
	Or;
	Using the following code:

 

   L_DocAddPage(hDoc, &Bitmap, -1);

5.	Find all available zones automatically.
	Using OCR Utility demo:
	Form "Zone" menu select "Find Zones". A dialog box will appear, then set the options as required and press "OK".
	Or;
	Using the following code:

 

   AUTOZONEOPTS ZoneOpts;
   memset(&ZoneOpts, 0, sizeof(AUTOZONEOPTS)); 
   L_DocGetZoneOptions(hDoc, &ZoneOpts, sizeof(AUTOZONEOPTS)); 
   AutoOpts.Parser = PARSE_LEGACY; 
   AutoOpts.bVisibleGridLines = TRUE; 
   L_DocSetZoneOptions(hDoc, &ZoneOpts); 
   L_DocFindZones(hDoc, 0, NULL); 

	The engine will detect all zones automatically and show the detected zones in the client area.
	The following code draws the page with all the detected zones and selects the third zone:

 

   RECT clipArea;
   RECT dstArea;
   GetClipBox(hdc, &clipArea); 
   dstArea.left = 0; 
   dstArea.top = 0; 
   dstArea.right = Bitmap.Width; 
   dstArea.bottom = Bitmap.Height; 
   L_DocDrawPage(hDoc, hdc, 0, NULL, NULL, &dstArea, &clipArea, SRCCOPY, TRUE); 
   L_DocSelectZone(hDoc, hdc, 0, 2, TRUE); 

6.	Recognize the OCR document (which contains 1 page).
	Using OCR Utility demo:
	Form the "OCR" menu select "Recognize Page". The Recognize Page dialog box will appear, then set the options as required and press "OK":
	The page will be recognized and a recognition data file (RDF) will be generated in the path that is specified in the Recognize Page dialog. Keep this file for saving recognition results.
	Or;
	Using the following code:

 

   RECOGNIZEOPTS MyRecogOpts;
   memset(&MyRecogOpts, 0, sizeof(RECOGNIZEOPTS));
   MyRecogOpts.uStructSize       = sizeof(RECOGNIZEOPTS); 
   MyRecogOpts.nPageIndexStart   = 0; 
   MyRecogOpts.nPagesCount       = 1; 
   MyRecogOpts.bEnableSubSystem  = TRUE; 
   MyRecogOpts.bEnableCorrection = TRUE; 
   MyRecogOpts.SpellLangId       = LANG_ID_ENGLISH; 
   MyRecogOpts.pszFileName       = MAKE_IMAGE_PATH(TEXT("OCR1.rdf"));
   L_DocRecognize(hDoc, &MyRecogOpts, NULL, NULL); 

7.	Save the recognition results to MS Word document.
	Using OCR Utility demo:
	From "OCR" menu select "Save Result". A dialog box will appear, then set the options as required and press "OK".
	Using the following code (It saves the recognition results then shuts down the OCR engine):

 

   RESULTOPTIONS ResOpts; 
   memset(&ResOpts, 0, sizeof(RESULTOPTIONS)); 
   L_DocGetRecognitionResultOptions(hDoc, &ResOpts, sizeof(RESULTOPTIONS)); 
   ResOpts.Format = DOC_WORD_97_2000_XP; 
   ResOpts.FormatLevel = FORMAT_LEVEL_FULL; 
   L_DocSetRecognitionResultOptions(hDoc, &ResOpts); 
   L_DocSaveResultsToFile(hDoc, MAKE_IMAGE_PATH(TEXT("OCR1.doc")));
   L_DocShutDown(&hDoc);

 

8.	Open the output file; it will be as follows:

For more information, refer to:

Programming with LEADTOOLS OCR

Demo Programs

Tutorials

OCR Frequently Asked Questions