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[Swftools-common] Re: pdf2swf textSnapshots in OCR'ed PDF files

From: tachy0n tachy0n
Subject: [Swftools-common] Re: pdf2swf textSnapshots in OCR'ed PDF files
Date: Wed, 5 Aug 2009 10:13:11 -0700

I'm not sure if my previous mail went to the list as I had not
subscribed to the mailing list when I sent it. So I'm resending it
again. Any pointers in the right direction would be helpful.

I've tried changing the z-order of the Static Text to be above the
Shapes (Bitmaps) and set the alpha for the static text to 0 so that
just the highlights will be visible, but that shows a solid yellow
highlight on top of the bitmap for the selected text.

On Mon, Aug 3, 2009 at 4:47 PM, tachy0n tachy0n<address@hidden> wrote:
> I'm writing a viewer for pdf2swf produced swf file that allows
> searching for texts with the swf. I used the example provided here -
> http://wiki.swftools.org/index.php/How_do_I_highlight_text_in_the_SWF%3F
> - and was able to successfully search for and highlight matching texts
> on swf created from digital PDF documents (i.e. PDFs which are created
> from other formats like MS word etc.)
> I wanted to do the same for PDF documents created with a scanner. So I
> took the scanned document, dumped the jpeg pages using xpdf and ran
> cuneiform OCR with hocr2pdf script to create a searchable PDF. The
> searchable PDF works as expected when opened in Adobe PDF reader with
> search highlighting and text select/copy.
> However when I load it in my viewer, the text highlights are not shown
> even though the textsnapshots for each frame in the MovieClip has the
> OCR'ed text including the correct font metrics/bounding boxes. When I
> set the alpha of the movie clip to <1 the highlight shows up correctly
> (albeit with spacing between characters probably due to inaccurate
> font metric).
> Is there anything different in the way pdf2swf creates a swf when it
> is run on a searchable scanned PDF (jpegs + embedded text)? How can I
> make the search highlighting work without having to reduce the alpha
> value of the displayed document?
> Thanks,
> tachy0n

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