[xep-support] Re: Searchable image PDFs

[Kevin Brown]

Brian:

1) Drop down the text in a block on the page. I would put it in an absolute
container in a small font to ensure it all fits and will not cause a flow
problem.

2) Stamp the image over the top using an absolute positioned container whose
z-order is higher than the block, usually placed at the end of the flow for
that page.

3) You can control paging by inserting a simple structure like:
	<fo:block break-after="page"><fo:leader/></fo:block>

So you would have something like this .... have not tested but should work
...

<fo:block-container> <!-- make absolute and place on the page -->
	<fo:block>Searchable text here</fo:block>
</fo:block-container>
<fo:block-container> <!-- make absolute and place on the page over the text
block above -->
	<fo:block>
		<fo:external-image src="url('mytif.tif')"/>
	</fo:block>
<fo:block-container>
<fo:block break-after="page"><fo:leader/></fo:block> <!-- go to next page
-->

If you wish to do it in a flow ... this is also possible. Just design the
block containers to overlap each other. Just do the opposite of this
example:

http://www.dpawson.co.uk/xsl/sect3/fofixedposn.html#d12230e136


sample attached.

Kevin Brown
RenderX

-----Original Message-----
From: xep-support-bounces at renderx.com
[mailto:xep-support-bounces at renderx.com] On Behalf Of Brian Sheppard
Sent: Wednesday, May 25, 2011 1:34 PM
To: xep-support at renderx.com
Subject: [xep-support] Searchable image PDFs

I'm giving this a bump, since I haven't found a solution. I'm attempting to
build a PDF where the TIFF page-images are visible and the embedded OCR is
not. (Though the OCR is searchable.)

I've tried including the page-image file as an external graphic, with the
OCR in a hidden block (<fo:block visibility="hidden"> ... </fo:block>), but
the OCR remains visible. 

I feel like I'm missing something obvious.

-Brian

> I'm unable to find any indication that XEP supports creating searchable
image PDFs. Can anyone clarify?
> 
> Specifically, I'd like to produce PDFs that incorporate dirty OCR beneath
scanned page images.
> 
> Thanks for any insight.
> 
> -Brian
> 
> 
> 
> 
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