ByteScout Text Recognition SDK – VB.NET – Extract From Areas

  • Home
  • /
  • Articles
  • /
  • ByteScout Text Recognition SDK – VB.NET – Extract From Areas

ByteScout Text Recognition SDK – VB.NET – Extract From Areas


Imports System.Drawing
Imports Bytescout.TextRecognition

Module Module1

    Sub Main()

        Dim inputDocument As String = ".\areas-sample.pdf"
        Dim pageIndex As Integer = 0
        Dim outputDocument As String = ".\result.txt"

        ' Create and activate TextRecognizer instance
        Using textRecognizer As TextRecognizer = New TextRecognizer("demo", "demo")

                ' Load document (image or PDF)

                ' Set location of "tessdata" folder containing language data files
                textRecognizer.OCRLanguageDataFolder = "c:\Program Files\ByteScout Text Recognition SDK\tessdata\"

                ' Set OCR language.
                ' "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "tessdata" folder
                ' Find more language files at
                textRecognizer.OCRLanguage = "eng" 
                ' Get page size (in pixels). Size of PDF document is computed from PDF Points 
                ' and the rendering resoultion specified by `textRecognizer.PDFRenderingResolution` (default 300 DPI)
                Dim pageSize As Size = textRecognizer.GetPageSize(pageIndex)

                ' Add area of interest as a rectangle at the top-right corner of the page
                textRecognizer.RecognitionAreas.Add(pageSize.Width / 2, 0, pageSize.Width / 2, 300)
                ' Add area of interest as a rectangle at the bottom-left corner of the page,
                ' and indicate it should be rotated at 90 deg
                textRecognizer.RecognitionAreas.Add(0, pageSize.Height / 2, 300, pageSize.Height / 2, AreaRotation.Rotate90FlipNone)

                ' Now you can get recognized text for further analysis as a list of objects 
                ' containing coordinates, object kind, confidence.
                Dim ocrObjectList As OCRObjectList = textRecognizer.GetOCRObjects(pageIndex)
                For Each ocrObject As OCRObject In ocrObjectList

                ' ... or you can save recognized text pieces to file
                textRecognizer.KeepTextFormatting = False ' save without formatting
                textRecognizer.SaveText(outputDocument, pageIndex, pageIndex)

                ' Open the result file in default associated application (for demo purposes)

            Catch exception As Exception


            End Try

        End Using

    End Sub

End Module

  Click here to get your Free Trial version of the SDK