static void Main(string[] args)
{
// Create Bytescout.PDFExtractor.TextExtractor instance
SearchablePDFMaker searchablePDFMaker = new SearchablePDFMaker();
searchablePDFMaker.RegistrationName = "demo";
searchablePDFMaker.RegistrationKey = "demo";
// Load sample PDF document
searchablePDFMaker.LoadDocumentFromFile("sample_ocr.pdf");
// Set the location of "tessdata" folder containing language data files
searchablePDFMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\Redistributable\net2.00\tessdata\";
// Set OCR language
searchablePDFMaker.OCRLanguage = "eng"; // "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in /tessdata
// Set PDF document rendering resolution
searchablePDFMaker.OCRResolution = 300;
// Save extracted text to file
searchablePDFMaker.MakePDFSearchable("output.pdf");
searchablePDFMaker.Dispose();
// Open output file in default associated application
System.Diagnostics.Process.Start("output.pdf");
}
static void Main(string[] args)
{
// Create Bytescout.PDFExtractor.TextExtractor instance
SearchablePDFMaker searchablePDFMaker = new SearchablePDFMaker();
searchablePDFMaker.RegistrationName = "demo";
searchablePDFMaker.RegistrationKey = "demo";
// Load sample PDF document
searchablePDFMaker.LoadDocumentFromFile("sample_ocr.pdf");
// Set the location of language data files
searchablePDFMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\ocrdata\";
// Set OCR language
searchablePDFMaker.OCRLanguage = "eng"; // "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "ocrdata" folder
// Set PDF document rendering resolution
searchablePDFMaker.OCRResolution = 300;
// Save extracted text to file
searchablePDFMaker.MakePDFSearchable("output.pdf");
// Cleanup
searchablePDFMaker.Dispose();
// Open output file in default associated application
ProcessStartInfo processStartInfo = new ProcessStartInfo("output.pdf");
processStartInfo.UseShellExecute = true;
Process.Start(processStartInfo);
}
static void Main(string[] args)
{
try
{
/*
* By default, "SearchablePDFMaker" uses one of the standard PDF fonts to apply
* recognized text over the scanned document. Such fonts contain only basic characters
* from ISO-8859-1 charset.
* If you run OCR for one of the languages with characters that are not present in the default
* encoding, you should explicitly specify the font that contains the required characters
* using ".LabelingFont" property.
* If you run the application in Windows with a selected locale that matches OCR language,
* it will be enough to specify the usual font "Arial". But if your app will run in an unknown
* environment (for example, in some virtual machine) you will need to install some full Unicode
* font (e.g. "Arial Unicode MS") and then use it with SearchablePDFMaker:
*
* //searchablePDFMaker.LabelingFont = "Arial Unicode MS";
*/
using (var searchablePDFMaker = new SearchablePDFMaker("demo", "demo"))
{
// Load sample PDF document
searchablePDFMaker.LoadDocumentFromFile("sample_ocr.pdf");
// Extractor Progress event
Console.WriteLine("Searchable PDF making in progress: \n");
searchablePDFMaker.ProgressChanged += SearchablePDF_ProgressChanged;
// Set the location of OCR language data files
searchablePDFMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\ocrdata_best\";
// Set OCR language
searchablePDFMaker.OCRLanguage = "eng"; // "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "ocrdata" folder
// Find more language files at https://github.com/bytescout/ocrdata
// Set PDF document rendering resolution
searchablePDFMaker.OCRResolution = 300;
// Save extracted text to file
searchablePDFMaker.MakePDFSearchable("output.pdf");
// Open result document in default associated application (for demo purpose)
ProcessStartInfo processStartInfo = new ProcessStartInfo("output.pdf");
processStartInfo.UseShellExecute = true;
Process.Start(processStartInfo);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine("\n\n Press enter key to exit...");
Console.ReadLine();
}
static void Main(string[] args)
{
/*
* By default, "SearchablePDFMaker" uses one of the standard PDF fonts to apply
* recognized text over the scanned document. Such fonts contain only basic characters
* from ISO-8859-1 charset.
* If you run OCR for one of the languages with characters that are not present in the default
* encoding, you should explicitly specify the font that contains the required characters
* using ".LabelingFont" property.
* If you run the application in Windows with a selected locale that matches OCR language,
* it will be enough to specify the usual font "Arial". But if your app will run in an unknown
* environment (for example, in some virtual machine) you will need to install some full Unicode
* font (e.g. "Arial Unicode MS") and then use it with SearchablePDFMaker:
*
* //searchablePDFMaker.LabelingFont = "Arial Unicode MS";
*/
// Create Bytescout.PDFExtractor.TextExtractor instance
SearchablePDFMaker searchablePDFMaker = new SearchablePDFMaker();
searchablePDFMaker.RegistrationName = "demo";
searchablePDFMaker.RegistrationKey = "demo";
// Load sample PDF document
searchablePDFMaker.LoadDocumentFromFile("sample_ocr_withText.pdf");
// Set the location of language data files
searchablePDFMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\ocrdata_best\";
// Set OCR language
searchablePDFMaker.OCRLanguage = "eng"; // "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "ocrdata" folder
// Set PDF document rendering resolution
searchablePDFMaker.OCRResolution = 300;
// Discard Existing Text in document
searchablePDFMaker.DiscardExistingDocumentText = true;
// Save extracted text to file
searchablePDFMaker.MakePDFSearchable("output.pdf");
// Cleanup
searchablePDFMaker.Dispose();
// Open output file in default associated application
ProcessStartInfo processStartInfo = new ProcessStartInfo("output.pdf");
processStartInfo.UseShellExecute = true;
Process.Start(processStartInfo);
}
private static void ThreadProc(object stateInfo)
{
int threadIndex = (int)((object[])stateInfo)[0];
ManualResetEvent doneEvent = (ManualResetEvent)((object[])stateInfo)[1];
string inputFile = (string)((object[])stateInfo)[2];
string outputFile = (string)((object[])stateInfo)[3];
int startPage = (int)((object[])stateInfo)[4];
int endPage = (int)((object[])stateInfo)[5];
try
{
Console.WriteLine("Thread #{0} started with the page range from {1} to {2}.", threadIndex, startPage, endPage);
Stopwatch stopwatch = Stopwatch.StartNew();
// Extract a piece of document
string chunk = string.Format("temp-{0}-{1}", startPage, endPage);
using (DocumentSplitter splitter = new DocumentSplitter("demo", "demo"))
splitter.ExtractPageRange(inputFile, chunk, startPage + 1, endPage + 1);
// Process the piece
using (SearchablePDFMaker searchablePdfMaker = new SearchablePDFMaker("demo", "demo"))
{
searchablePdfMaker.OCRDetectPageRotation = true;
searchablePdfMaker.OCRLanguageDataFolder = @"C:\Program Files\Bytescout PDF Extractor SDK\net4.00\tessdata";
searchablePdfMaker.LoadDocumentFromFile(chunk);
// 300 DPI resolution is recommended.
// Using of higher values will slow down the processing but does not guarantee the higher quality.
searchablePdfMaker.OCRResolution = 300;
searchablePdfMaker.MakePDFSearchable(outputFile);
}
File.Delete(chunk);
Console.WriteLine("Thread #{0} finished in {1}.", threadIndex, stopwatch.Elapsed);
}
finally
{
// Signal the thread is finished
doneEvent.Set();
// Release semaphore
ThreadLimiter.Release();
}
}
static void Main(string[] args)
{
try
{
using (var searchablePDFMaker = new SearchablePDFMaker("demo", "demo"))
{
// Load sample PDF document
searchablePDFMaker.LoadDocumentFromFile("sample_ocr.pdf");
// Extractor Progress event
Console.WriteLine("Searchable PDF making in progress: \n");
searchablePDFMaker.ProgressChanged += SearchablePDF_ProgressChanged;
// Set the location of OCR language data files
searchablePDFMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\ocrdata_best\";
// Set OCR language
searchablePDFMaker.OCRLanguage = "eng"; // "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "ocrdata" folder
// Find more language files at https://github.com/bytescout/ocrdata
// Set PDF document rendering resolution
searchablePDFMaker.OCRResolution = 300;
// Save extracted text to file
searchablePDFMaker.MakePDFSearchable("output.pdf");
// Open result document in default associated application (for demo purpose)
ProcessStartInfo processStartInfo = new ProcessStartInfo("output.pdf");
processStartInfo.UseShellExecute = true;
Process.Start(processStartInfo);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine("\n\n Press enter key to exit...");
Console.ReadLine();
}
static void Main(string[] args)
{
try
{
// Files
string fileName = "hindi_text_with_image.pdf";
string destFileName = "output_hindi_text_with_image.pdf";
string destFileName_serachable = "output_hindi_text_with_image_searchable.pdf";
// Read all text from pdf file
string allTextExtracted = "";
using (TextExtractor extractor = new TextExtractor())
{
// Load PDF document
extractor.LoadDocumentFromFile(fileName);
// Read all text directly
allTextExtracted = extractor.GetText();
}
// Get image from pdf file
MemoryStream memoryStream = new MemoryStream();
using (ImageExtractor extractor = new ImageExtractor())
{
// Load PDF document
extractor.LoadDocumentFromFile(fileName);
if (extractor.GetFirstImage())
{
extractor.SaveCurrentImageToStream(memoryStream, ImageFormat.Png);
}
}
// Load image from file to System.Drawing.Image object (we need it to get the image resolution)
using (System.Drawing.Image sysImage = System.Drawing.Image.FromStream(memoryStream))
{
// Compute image size in PDF units (Points)
float widthInPoints = sysImage.Width / sysImage.HorizontalResolution * 72f;
float heightInPoints = sysImage.Height / sysImage.VerticalResolution * 72f;
// Create new PDF document
using (Document outPdfDocument = new Document())
{
outPdfDocument.RegistrationName = "demo";
outPdfDocument.RegistrationKey = "demo";
// Create page of computed size
Page page = new Page(widthInPoints, heightInPoints);
// Add page to the document
outPdfDocument.Pages.Add(page);
Canvas canvas = page.Canvas;
// Create Bytescout.PDF.Image object from loaded image
Image pdfImage = new Image(sysImage);
// Draw the image
canvas.DrawImage(pdfImage, 0, 0, widthInPoints, heightInPoints);
// Dispose the System.Drawing.Image object to free resources
sysImage.Dispose();
// Create brush
SolidBrush transparentBrush = new SolidBrush(new ColorGray(0));
// ... and make it transparent
transparentBrush.Opacity = 0;
// Draw text with transparent brush
// Need to set Font which supports hindi characters.
Font font16 = new Font("Arial Unicode MS", 16);
canvas.DrawString(allTextExtracted, font16, transparentBrush, 40, 40);
// Save document to file
outPdfDocument.Save(destFileName);
}
}
// Make PDF file with hindi text searchable to OCR.
using (SearchablePDFMaker searchablePDFMaker = new SearchablePDFMaker())
{
//Load PDF document
searchablePDFMaker.LoadDocumentFromFile(destFileName);
// Set the location of "tessdata" folder containing language data files
/*
* It used following files for hindi language support. Need to put these files into "testdata" folder. Below location contains these files.
* https://github.com/tesseract-ocr/tessdata/tree/3.04.00
* hin.traineddata
* hin.cube.bigrams
* hin.cube.lm
* hin.cube.nn
* hin.cube.params
* hin.cube.word-freq
* hin.tesseract_cube.nn
*/
searchablePDFMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\Redistributable\net2.00\tessdata\";
// Set OCR language
searchablePDFMaker.OCRLanguage = "hin";
// Need to set Font which supports hindi characters
searchablePDFMaker.LabelingFont = "Arial Unicode MS";
// Set PDF document rendering resolution
searchablePDFMaker.OCRResolution = 300;
searchablePDFMaker.MakePDFSearchable(destFileName_serachable);
}
// Open document in default PDF viewer app
Process.Start(destFileName_serachable);
}
catch (Exception ex)
{
Console.WriteLine("ERROR:" + ex.Message);
}
Console.ReadLine();
}
static void Main(string[] args)
{
MemoryStream searchablePDFStream = new MemoryStream();
// STEP-1: Make Searchable PDF
// STEP-2: Get search text result from that searchable PDF
// STEP-3: Remove sensitive data
// Create Bytescout.PDFExtractor.SearchablePDFMaker instance
using (var searchablePDFMaker = new SearchablePDFMaker("demo", "demo"))
{
// Load sample PDF document
searchablePDFMaker.LoadDocumentFromFile("sampleScannedPDF_EmailAddress.pdf");
// Set the location of language data files
searchablePDFMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\ocrdata_best\";
// Set OCR language
searchablePDFMaker.OCRLanguage = "eng"; // "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "ocrdata" folder
// Set PDF document rendering resolution
searchablePDFMaker.OCRResolution = 300;
// Save extracted text to file
searchablePDFMaker.MakePDFSearchable(searchablePDFStream);
// Prepare TextExtractor
using (TextExtractor textExtractor = new TextExtractor("demo", "demo"))
{
// Load stream into TextExtractor
textExtractor.LoadDocumentFromStream(searchablePDFStream);
// Search email Addresses
// See the complete regular expressions reference at https://msdn.microsoft.com/en-us/library/az24scfc(v=vs.110).aspx
string regexPattern = @"\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b";
// Enable RegexSearch
textExtractor.RegexSearch = true;
// Set word matching options
textExtractor.WordMatchingMode = WordMatchingMode.None;
ISearchResult[] searchResults = textExtractor.FindAll(0, regexPattern, caseSensitive: false);
// Create Bytescout.PDFExtractor.Remover instance
using (var remover = new Remover2("demo", "demo"))
{
// Load sample PDF document
remover.LoadDocumentFromStream(searchablePDFStream);
// Mask removed text
remover.MaskRemovedText = true;
// Make output file unsearchable
remover.MakePDFUnsearchable = true;
// Provide text to remove
remover.AddTextToRemove(searchResults);
// Remove text objects find by SearchResults.
remover.PerformRemoval("result1.pdf");
}
}
}
// Open output file in default application
ProcessStartInfo processStartInfo = new ProcessStartInfo("result1.pdf");
processStartInfo.UseShellExecute = true;
Process.Start(processStartInfo);
}
private static void ThreadProc(object stateInfo)
{
int threadIndex = (int)((object[])stateInfo)[0];
ManualResetEvent doneEvent = (ManualResetEvent)((object[])stateInfo)[1];
string inputFile = (string)((object[])stateInfo)[2];
string outputFile = (string)((object[])stateInfo)[3];
int startPage = (int)((object[])stateInfo)[4];
int endPage = (int)((object[])stateInfo)[5];
try
{
Console.WriteLine("Thread #{0} started with the page range from {1} to {2}.", threadIndex, startPage, endPage);
Stopwatch stopwatch = Stopwatch.StartNew();
// Extract a piece of document
string chunk = string.Format("temp-{0}-{1}", startPage, endPage);
using (DocumentSplitter splitter = new DocumentSplitter("demo", "demo"))
splitter.ExtractPageRange(inputFile, chunk, startPage + 1, endPage + 1);
/*
* By default, "SearchablePDFMaker" uses one of the standard PDF fonts to apply
* recognized text over the scanned document. Such fonts contain only basic characters
* from ISO-8859-1 charset.
* If you run OCR for one of the languages with characters that are not present in the default
* encoding, you should explicitly specify the font that contains the required characters
* using ".LabelingFont" property.
* If you run the application in Windows with a selected locale that matches OCR language,
* it will be enough to specify the usual font "Arial". But if your app will run in an unknown
* environment (for example, in some virtual machine) you will need to install some full Unicode
* font (e.g. "Arial Unicode MS") and then use it with SearchablePDFMaker:
*
* //searchablePDFMaker.LabelingFont = "Arial Unicode MS";
*/
// Process the piece
using (SearchablePDFMaker searchablePdfMaker = new SearchablePDFMaker("demo", "demo"))
{
searchablePdfMaker.OCRDetectPageRotation = true;
searchablePdfMaker.OCRLanguageDataFolder = @"c:\Program Files\Bytescout PDF Extractor SDK\ocrdata_best\";
searchablePdfMaker.LoadDocumentFromFile(chunk);
// 300 DPI resolution is recommended.
// Using of higher values will slow down the processing but does not guarantee the higher quality.
searchablePdfMaker.OCRResolution = 300;
searchablePdfMaker.MakePDFSearchable(outputFile);
}
File.Delete(chunk);
Console.WriteLine("Thread #{0} finished in {1}.", threadIndex, stopwatch.Elapsed);
}
finally
{
// Signal the thread is finished
doneEvent.Set();
// Release semaphore
ThreadLimiter.Release();
}
}
