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Make Searchable PDF | VB.NET
Module1.vb:
VB
Imports Bytescout.PDFExtractor Module Module1 Sub Main() ' 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 Dim searchablePdfMaker As SearchablePDFMaker = New SearchablePDFMaker() searchablePdfMaker.RegistrationName = "demo" searchablePdfMaker.RegistrationKey = "demo" ' Load sample PDF document searchablePdfMaker.LoadDocumentFromFile("sample_ocr.pdf") ' 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 ' Set PDF document rendering resolution searchablePdfMaker.OCRResolution = 300 ' Process document searchablePdfMaker.MakePDFSearchable("output.pdf") ' Cleanup searchablePDFMaker.Dispose() ' Open output file in default associated application System.Diagnostics.Process.Start("output.pdf") End Sub End Module