You can do this, but you'll need more than just the text. You'll
also need the POSITION of each character/word on the page, so that
you properly position the hidden text along with the image to ensure
proper selection of the text by viewers (like Acrobat).
Leonard
On Dec 14, 2007, at 7:29 AM, [EMAIL PROTECTED] wrote:
Hi,
We use iText to produce a PDF document that is a combination of
data, user supplied PDFs and system generated PDFs, all combined
into one large PDF. Some of the user supplied PDF files contain
pages that are scanned documents and contain no searchable text,
only an image of the scanned document. I have been looking for OCR
products that can OCR/extract text from these pages that are just
images, with limited success. I have found one, which I am
experimenting with from Asprise. Anyone have experience with OCR/
extracting text from scanned pages inside a PDF? Supposing I can
OCR/extract this text, can I use iText to insert a hidden text
layer beneath these images that would make these pages text
searchable? I don't want to change the appearance of the page, but
simply insert the text underneath so it becomes a searchable page.
Thanks,
Jody
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