Searchable pdf from colored scanned pdf files

[charuvas1]

hi,

I have been trying to create searchable pdf from colored scanned pdf file. Following is the code I picked up from this forum-

Code: Select all

       PDFid = oGdPictureImaging.PdfOCRStart(strflname, False, "", "", "", "", "")
            For i As Integer = 1 To GdViewer1.PageCount
                imageid = GdViewer1.PdfRenderPageToGdPictureImage(200, i)
              [color=#FF4040]  oGdPictureImaging.ConvertTo1Bpp(imageid)[/color]
                oGdPictureImaging.PdfAddGdPictureImageToPdfOCR(PDFid, imageid, TesseractDictionary.TesseractDictionaryEnglish, TextBox1.Text, "")
                GdViewer1.ReleaseGdPictureImage(imageid)
            Next
            oGdPictureImaging.PdfOCRStop(PDFid)

This creates a Black and white searchable pdf file. If I comment the line where it converts image to BW, I get a deadlock soon. Can you guide me how to go about creating a searchable pdf file without loosing its colors?

Thank you
Charu

[Loïc]

Hi,

I don't understand what you mean by:

I get a deadlock soon

I tried the following code without any issue:

Code: Select all

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim PDFid As Integer
        Dim imageid As Integer
        GdViewer1.DisplayFromFile("c:\input.pdf")
        PDFid = oGdPictureImaging.PdfOCRStart("c:\output.pdf", False, "", "", "", "", "")
        For i As Integer = 1 To GdViewer1.PageCount
            imageid = GdViewer1.PdfRenderPageToGdPictureImage(200, i)
            'oGdPictureImaging.ConvertTo1Bpp(imageid)
            oGdPictureImaging.PdfAddGdPictureImageToPdfOCR(PDFid, imageid, TesseractDictionary.TesseractDictionaryEnglish, TextBox1.Text, "")
            GdViewer1.ReleaseGdPictureImage(imageid)
        Next
        oGdPictureImaging.PdfOCRStop(PDFid)
    End Sub

Kind regards,

Loïc