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.
	$image\ocr_util_frame.gif$
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".
	$image\ocr_util_open_dlg.gif$
	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".
	$image\ocr_util_page.gif$
	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".
	$image\ocr_util_find_zones_dlg.gif$
	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.
	$image\ocr_util_page_zones.gif$
	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":
	$image\ocr_util_recognize_dlg.gif$
	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".
	$image\ocr_util_save_results.gif$
	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:
	$image\ocr_util_result_doc.gif$

For more information, refer to:

Programming with LEADTOOLS OCR

Demo Programs

Tutorials

OCR Frequently Asked Questions