Working With Recognition Results (Visual C++ 5.0 and later))

Working with Recognition Results (Visual C++ 5.0 and later

Take the following steps to add code to the existing project that will let you recognize pages:

1.	Start with the program you created in Working with Zones.
2.	Add the following command buttons to the main window and set the ID and Caption properties as follows:
	ID	Caption
	IDC_GET_OUTPUTFORMAT	Get Output Format
	IDC_SAVE_DOCUMENT	Save Document

3.	Press Ctrl-W to go to the MFC Class Wizard; then do the following:
	a.	Click the Message Maps tab.
	b.	In the Class Name combo box, select COCRTutorDlg.
	c.	In the Object IDs list box, select IDC_GET_OUTPUTFORMAT.
	d.	In the Messages list box, select BN_CLICKED
	e.	Click the Add function button. Choose OK for the default function name (OnGetOutputformat).
	f.	Click the Edit Code button and code the OnGetOutputformat procedure as follows:

   CString csBuffer;
   nRet = m_pRasterDoc->GetOutputFileFormats ();
   if (nRet != 0)
   {
      csBuffer.Format (TEXT("Error %d in enumerating available file formats"), nRet);
      AfxMessageBox (csBuffer);
   }

4.	Press Ctrl-W to go to the MFC Class Wizard; then do the following:
	a.	Click the Message Maps tab.
	b.	In the Class Name combo box, select COCRTutorDlg.
	c.	In the Object IDs list box, select IDC_SAVE_DOCUMENT.
	d.	In the Messages list box, select BN_CLICKED
	e.	Click the Add function button. Choose OK for the default function name (OnSaveDocument).
	f.	Click the Edit Code button and code the OnSaveDocument procedure as follows:

   CString csBuffer;

   int nRet = m_pRasterDoc->GetRecognitionResultOptions ();
   if (nRet == 0)
   {
      m_pRasterDoc->GetResultOptions ()->FormatLevel = FORMATLEVEL_FULL;
      m_pRasterDoc->GetResultOptions()->GetDocumentOptions ()->PaperSizeMode = SELPREDEFINED;
      m_pRasterDoc->GetResultOptions ()->GetDocumentOptions ()->PaperType = PAPER_A4;

      m_pRasterDoc->SetRecognitionResultOptions ();
      nRet = m_pRasterDoc->SaveDocument ("c:\\test.doc");
      if (nRet != 0)
      {
         csBuffer.Format (TEXT("Error %d in saving recognition result to a file"), nRet);
         AfxMessageBox (csBuffer);
      }
   }

5.	Edit the header for the Sink class:
	a.	In the Project Workspace, click the FileView tab.
	b.	Double-click the OCRTutor Files folder to open it.
	c.	Double-click the Header Files folder to open it.
	d.	Double-click the RasterOCRSink.h file to edit it.
	e.	Add the following just before //}}AFX_MSG:

afx_msg void OnEnumOutputFileFormats (FORMATTYPE Format);

	f.	Edit the source for the Sink class:
	g.	In the Project Workspace, click the FileView tab.
	h.	Double-click the Source Files folder.
	i.	Double-click the RasterOCRSink.cpp file to edit it.
	j.	Add the following to the DISPATCH_MAP:

DISP_FUNCTION_ID(CRasterOCRSink," EnumOutputFileFormats",3, OnEnumOutputFileFormats, VT_EMPTY, VTS_I2)

Add the following to the end of the file:

   int nRet;
   CString csBuffer;

   nRet = this->m_pDlg->m_pRasterDoc->GetFileFormatInfo (Format);
   if (nRet == 0)
   {
      csBuffer.Format (TEXT("Format Name = %s\nFormat DLL Name = %s\nFormat Ext Name = %s\n"),
               m_pDlg->m_pRasterDoc->GetFileFormatInfo ()->FormatName,
               m_pDlg->m_pRasterDoc->GetFileFormatInfo ()->DLLName,
               m_pDlg->m_pRasterDoc->GetFileFormatInfo ()->ExtName);

      AfxMessageBox(csBuffer);

FORMAT_OUTPUT_TYPE type = m_pDlg->m_pRasterDoc->GetFileFormatInfo ()->Type;

      switch (type)
      {
      case OUTTYPE_PLAIN:
         csBuffer.Format (TEXT("Format Type = Plain"));
         break;
      case OUTTYPE_WORD_PROCESSOR:
         csBuffer.Format (TEXT("Format Type = Word Processor"));
         break;
      case OUTTYPE_TRUE_WORD_PROCESSOR:
         csBuffer.Format (TEXT("Format Type = True Word Processor"));
         break;
      case OUTTYPE_TABLE:
         csBuffer.Format (TEXT("Format Type = Table"));
         break;
      case OUTTYPE_UNKNOWN:
         csBuffer.Format (TEXT("Format Type = Unknown"));
         break;
      }

      AfxMessageBox(csBuffer);
   }

6.	Build OCRTutor.exe.
7.	Run OCRTutor.exe.