HOW TO: Convert a Non-Searchable PDF to a Searchable PDF

#1 Posted : Tuesday, March 13, 2018 11:15:52 AM(UTC)

Christopher Thompson

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Posts: 89

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In the Example code below we show how to use the LEAD OCR engine to convert a non-searchable PDF to a searchable PDF.

This is a very simple process as outlined below:

Establish the Input and Output file paths.
Create and start the OCR engine.
Recognize the document and save.

At the bottom of this post is a functioning v20 C# project available for download, that includes a LEADTOOLS test file for converting.

C#

Code:


            string inFile = @"PATH TO NON-SEARCHABLE PDF";
            string outFile = @"OUTPUT PATH";

            using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, false))
            {
                ocrEngine.Startup(null, null, null, @"C:\LEADTOOLS 20\Bin\Common\OcrLEADRuntime");

                using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
                {
                    ocrDocument.Pages.AddPages(inFile, 1, -1, null);
                    ocrDocument.Pages.AutoZone(null);
                    ocrDocument.Pages.Recognize(null);

                    ocrDocument.Save(outFile, DocumentFormat.Pdf, null);
                    ocrDocument.Dispose();
                }
            }
            Console.ReadLine();

File Attachment(s):

convertPdfSearchable_20.zip (548kb) downloaded 119 time(s).

Edited by user Tuesday, September 11, 2018 2:12:53 PM(UTC) | Reason: Not specified

Chris Thompson
Developer Support Engineer
LEAD Technologies, Inc.

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HOW TO: Convert a Non-Searchable PDF to a Searchable PDF