References ▼
#include "ltdoc2.h"
L_LTDOC2_API L_INT EXT_FUNCTION L_Doc2GetRecognizedCharacters(hDoc, nPageIndex, ppRecogChars, plCharsCount, uStructSize)
Gets all recognized characters for the specified recognized page.
Handle to the OCR document.
Index of the recognized page for which to get the recognized characters. This index is zero-based.
Address of pointer to a RECOGCHARS2 structure into which an array of RECOGCHARS2 structures will be allocated and updated.
Pointer to a variable to be updated with the number of elements in the ppRecogChars array.
Size in bytes, of the structure pointed to by ppRecogChars, use sizeof(RECOGCHARS2) to calculate this value.
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
This function will allocate and return an array for all recognized characters for the specified recognized page in ppRecogChars.
This function will return the number of recognized characters in plCharsCount.
✅ IMPORTANT
You must free the memory associated with ppRecogChars parameter when it is no longer needed, by calling the L_Doc2FreeRecognizedCharacters / L_Doc2FreeRecognizedCharacters function.
This function can be called after a successful recognition process begun by calling the L_Doc2Recognize / L_Doc2RecognizeExt function.
⛔ CAUTION
This function should not be called before calling the L_Doc2Recognize / L_Doc2RecognizeExt function.
To update the recognized characters, call the L_Doc2SetRecognizedCharacters / L_Doc2SetRecognizedCharactersExt function. To save the updated recognized characters to a file, call the L_Doc2SaveResultsToFile / L_Doc2SaveResultsToFileExt function.
Required DLLs and Libraries
L_INT Doc2GetRecognizedCharactersExample(L_HDOC2 hDoc){L_INT nRet;RECOGNIZEOPTS2 RecogOpts;RecogOpts.uStructSize = sizeof(RECOGNIZEOPTS2);RecogOpts.nPageIndexStart = 0;RecogOpts.nPagesCount = 1;RecogOpts.SpellLangId = DOC2_LANG_ID_ENGLISH;nRet = L_Doc2Recognize (hDoc, &RecogOpts, NULL, NULL);if (nRet == SUCCESS){pRECOGCHARS2 pRecogChars = NULL;L_INT32 lCharsCount = 0;nRet = L_Doc2GetRecognizedCharacters(hDoc, 0, &pRecogChars, &lCharsCount, sizeof(RECOGCHARS2));if (nRet == SUCCESS){L_TCHAR szBuffer[1024];RESULTOPTIONS2 ResOpts;ZeroMemory(&ResOpts, sizeof(RESULTOPTIONS2));ZeroMemory(szBuffer, sizeof(szBuffer));wsprintf(szBuffer, TEXT("Number of recognized characters in the specified page = %d\n"), lCharsCount);MessageBox(NULL, szBuffer, TEXT("Recognized Characters Count"), MB_OK);for (L_INT32 i=0; i<lCharsCount; i++){if (pRecogChars[i].nConfidence > 900){pRecogChars[i].uFont |= DOC2_FONT_BOLD | DOC2_FONT_UNDERLINE;pRecogChars[i].nFontSize = 20;}}L_INT nClrsCount=0;nRet = L_Doc2GetRecognizedCharactersColors(hDoc, 0, NULL, &nClrsCount);if (nRet == SUCCESS){wsprintf(szBuffer, TEXT("Number of recognized characters colors in the specified page = %d\n"), nClrsCount);MessageBox(NULL, szBuffer, TEXT("Recognized Characters Colors Count"), MB_OK);if (nClrsCount > 0){COLORREF * pClrChars = (COLORREF *)GlobalAllocPtr(GHND, sizeof(COLORREF) * nClrsCount);nRet = L_Doc2GetRecognizedCharactersColors(hDoc, 0, pClrChars, &nClrsCount);if (nRet == SUCCESS){wsprintf(szBuffer, TEXT("Colors for 1st recognized character\nThe foreground color = %d\nThe background color = %d\n"), pClrChars[pRecogChars[0].nFGColorIndex], pClrChars[pRecogChars[0].nBGColorIndex]);MessageBox(NULL, szBuffer, TEXT("Recognized Character Colors"), MB_OK);}GlobalFreePtr(pClrChars);}}nRet = L_Doc2SetRecognizedCharacters(hDoc, 0, pRecogChars, lCharsCount);if(nRet != SUCCESS)return nRet;nRet = L_Doc2FreeRecognizedCharacters(hDoc, &pRecogChars);if(nRet != SUCCESS)return nRet;nRet = L_Doc2GetRecognitionResultOptions(hDoc, &ResOpts, sizeof(RESULTOPTIONS2));if(nRet != SUCCESS)return nRet;ResOpts.Format = DOC2_RTF_WORD_2000;ResOpts.FormatLevel = DOC2_FORMAT_LEVEL_AUTO;ResOpts.DocFormat = DOCUMENTFORMAT_USER;nRet = L_Doc2SetRecognitionResultOptions(hDoc, &ResOpts);if(nRet != SUCCESS)return nRet;nRet = L_Doc2SaveResultsToFile(hDoc, MAKE_IMAGE_PATH(TEXT("test.doc")));if(nRet != SUCCESS)return nRet;}}return SUCCESS;}