ByteScout Data Extraction Suite – VB.NET – Read text from noisy image with pdf extractor sdk

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ByteScout Data Extraction Suite – VB.NET – Read text from noisy image with pdf extractor sdk

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How to read text from noisy image with pdf extractor sdk in VB.NET and ByteScout Data Extraction Suite

Step-by-step tutorial on how to read text from noisy image with pdf extractor sdk in VB.NET

Source code documentation samples give simple and easy method to install a needed feature into your application. ByteScout Data Extraction Suite: 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. It can read text from noisy image with pdf extractor sdk in VB.NET.

The following code snippet for ByteScout Data Extraction Suite works best when you need to quickly read text from noisy image with pdf extractor sdk in your VB.NET application. This VB.NET sample code is all you need for your app. Just copy and paste the code, add references (if needs to) and you are all set! Enjoy writing a code with ready-to-use sample codes in VB.NET.

The trial version of ByteScout Data Extraction Suite can be downloaded for free from our website. It also includes source code samples for VB.NET and other programming languages.

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Program.vb

      Imports Bytescout.PDFExtractor

Module Program

    Sub Main()

        Try

            Using extractor As New TextExtractor()

                ' Load noisy image document
                extractor.LoadDocumentFromFile("sample.png")

                ' Set the font repairing OCR mode 
                extractor.OCRMode = OCRMode.TextFromImagesAndVectorsAndRepairedFonts

                ' Set the location of OCR language data files
                extractor.OCRLanguageDataFolder = "c:\Program Files\Bytescout PDF Extractor SDK\ocrdata\"

                ' Set OCR language
                extractor.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
                extractor.OCRResolution = 300

                ' You can also apply various preprocessing filters
                ' to improve the recognition on low-quality scans.

                Console.WriteLine("Please wait while PDF Extractor SDK is processing noisy image to read data...")

                ' Automatically deskew skewed scans
                extractor.OCRImagePreprocessingFilters.AddDeskew()

                ' Remove vertical Or horizontal lines (sometimes helps to avoid OCR engine's page segmentation errors)
                ' extractor.OCRImagePreprocessingFilters.AddVerticalLinesRemover();
                ' extractor.OCRImagePreprocessingFilters.AddHorizontalLinesRemover();

                ' Repair broken letters
                extractor.OCRImagePreprocessingFilters.AddDilate()

                ' Remove noise
                extractor.OCRImagePreprocessingFilters.AddMedian()

                ' Apply Gamma Correction
                extractor.OCRImagePreprocessingFilters.AddGammaCorrection()

                ' Add Contrast
                ' extractor.OCRImagePreprocessingFilters.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.

                ' Read all text
                Dim allText = extractor.GetText()

                Console.Clear()
                Console.WriteLine("Extracted Text: ")
                Console.WriteLine(allText)

            End Using

        Catch ex As Exception
            Console.Clear()
            Console.WriteLine("Exception: " + ex.Message)
        End Try

        Console.WriteLine("Press any key to exit...")
        Console.ReadLine()

    End Sub

End Module