Important Update
The example source codes on this page will display you how to make PDF and OCR (optical character recognition) with PDF extractor SDK in C++. ByteScout Data Extraction Suite was created to assist PDF and OCR (optical character recognition) with PDF extractor SDK in C++. ByteScout Data Extraction Suite is the set that includes 3 SDK products for data extraction from PDF, scans, images and from spreadsheets: PDF Extractor SDK, Data Extraction SDK, Barcode Reader SDK.
This rich and prolific sample source code in C++ for ByteScout Data Extraction Suite contains various functions and options you should do calling the API to implement PDF and OCR (optical character recognition) with PDF extractor SDK. To use PDF and OCR (optical character recognition) with PDF extractor SDK in your C++ project or application just copy & paste the code and then run your app! Check these C++ sample code examples to see if they acknowledge to your needs and requirements for the project.
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#include "stdafx.h"
#include "comip.h"
#import "c:\\Program Files\\Bytescout PDF Extractor SDK\\net4.00\\Bytescout.PDFExtractor.tlb" raw_interfaces_only
using namespace Bytescout_PDFExtractor;
int _tmain(int argc, _TCHAR* argv[])
{
// Initialize COM.
HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
// Create the interface pointer.
_TextExtractorPtr pITextExtractor(__uuidof(TextExtractor));
// Set the registration name and key
// Note: You should use _bstr_t or BSTR to pass string to the library because of COM requirements
_bstr_t bstrRegName(L"DEMO");
pITextExtractor->put_RegistrationName(bstrRegName);
_bstr_t bstrRegKey(L"DEMO");
pITextExtractor->put_RegistrationKey(bstrRegKey);
// Load sample PDF document
_bstr_t bstrPath(L"..\\..\\sample_ocr.pdf");
pITextExtractor->LoadDocumentFromFile(bstrPath);
// Enable Optical Character Recognition (OCR)
// in .Auto mode (SDK automatically checks if needs to use OCR or not)
pITextExtractor->put_OCRMode(OCRMode_Auto);
// Set the location of OCR language data files
_bstr_t bstrOCRLangDataPath(L"c:\\Program Files\\Bytescout PDF Extractor SDK\\ocrdata");
pITextExtractor->put_OCRLanguageDataFolder(bstrOCRLangDataPath);
// Set OCR language
_bstr_t bstrOCRLanguage(L"eng");
pITextExtractor->put_OCRLanguage(bstrOCRLanguage);
// Set PDF document rendering resolution
pITextExtractor->put_OCRResolution(300);
// You can also apply various preprocessing filters
// to improve the recognition on low-quality scans.
_ImagePreprocessingFiltersCollection* pIImagePreprocessingFilters;
pITextExtractor->get_OCRImagePreprocessingFilters(&pIImagePreprocessingFilters);
// Automatically deskew skewed scans
//pIImagePreprocessingFilters->AddDeskew();
// Remove vertical or horizontal lines (sometimes helps to avoid OCR engine's page segmentation errors)
//pIImagePreprocessingFilters->AddVerticalLinesRemover();
//pIImagePreprocessingFilters->AddHorizontalLinesRemover();
// Repair broken letters
//pIImagePreprocessingFilters->AddDilate();
// Remove noise
//pIImagePreprocessingFilters->AddMedian();
// Apply Gamma Correction
//pIImagePreprocessingFilters->AddGammaCorrection();
// Add Contrast
//pIImagePreprocessingFilters->AddContrast(20);
// (!) You can use new OCRAnalyser class to find an optimal set of image preprocessing
// filters for your specific document.
// See "OCR Analyser" example.
// Save extracted text to file
_bstr_t bstrOutputFile(L"output.txt");
pITextExtractor->SaveTextToFile(bstrOutputFile);
pITextExtractor->Release();
CoUninitialize();
return 0;
}
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// stdafx.cpp : source file that includes just the standard includes
// CPPExample.pch will be the pre-compiled header
// stdafx.obj will contain the pre-compiled type information
#include "stdafx.h"
// TODO: reference any additional headers you need in STDAFX.H
// and not in this file
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// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
//
#pragma once
#include "targetver.h"
#include <stdio.h>
#include <tchar.h>
// TODO: reference additional headers your program requires here
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#pragma once
// Including SDKDDKVer.h defines the highest available Windows platform.
// If you wish to build your application for a previous Windows platform, include WinSDKVer.h and
// set the _WIN32_WINNT macro to the platform you wish to support before including SDKDDKVer.h.
#include <SDKDDKVer.h>
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60 Day Free Trial or Visit ByteScout Data Extraction Suite Home Page
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