RE: [iText-questions] hidden text

[Paulo Soares]

Title: hidden text

It shouldn't be too difficult if you know the pdf format. The steps are:

 

- parse the content to keep just the images. Use PRTokeniser.

- eliminate the references to the fonts in the resources dictionary.

- call pdfReader.removeUnusedObjects()

- use PdfStamper to output the pdf

 

Best Regards,

Paulo Soares

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From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Whenham Patrick (Gecotec)
Sent: Monday, June 07, 2004 11:02 AM
To: [EMAIL PROTECTED]
Subject: [iText-questions] hidden text

Hi,

I have tons of image + hidden text pdfs ( paper -> tif -> pdf -> OCR-image+hidden text ).

To comply with legal constraints we have to deal with (100% quality OCR or none), I must remove the hidden text from the pdf files (the text generated by running OCR 'image + hidden text' on image pdfs, text that does not display, but allows searching and copy & paste ).

The output must be a no-longer-searchable pdf file with no means of selecting & copying text.
 
Is there any function in iText that allows this ?

Thanks,
Patrick

Patrick WHENHAM
GECOTEC & UCB Pharma

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