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From Richard Krenek <>
Subject Re: Indexing and Hit Highlighting OCR Data
Date Fri, 03 Jun 2005 12:50:06 GMT
  I have one off the wall approach that may or may not work for you.
If you convert your scanned images to PDF then use something like
Acrobat to convert those PDFs into PDFs with hidden text (The OCR
data). You can then tell Acrobat Reader via XML what to highlight when
your user opens the PDF.
  Not sure if that helps you but may give you some alternate ideas.


On 6/2/05, Corey Keith <> wrote:
> Hi,
> I am involved in a project which is trying to provide searching and hit highlighting
on the scanned image of historical newspapers.  We have an XML based OCR format.  A sample
is below.  We need to index the CONTENT attribute of the String element which is the easy
part.  We would like to be able find the "hits" within this XML document in order to use the
positioning information to draw the highlight boxes on the image.  It doesn't make a lot of
sense to just extract the CONTENT and index that because we loose the positioning information.
 My second thought was to make a custom analyzer which dropped everything except for the content
element and then used the highlighting class in the sandbox to reanalyze the XML document
and mark the hits.  With the marked hits in the XML we could find the position information
and draw on the image.  Has anyone else worked with OCR information and lucene.  What was
your approach?  Does this approach seem sound?  Any recommendations?
> Thanks, Corey
>      <TextLine HEIGHT="2307.0" WIDTH="2284.0" HPOS="1316.0" VPOS="123644.0">
>       <String STYLEREFS="ID4" HEIGHT="1922.0" WIDTH="244.0" HPOS="1316.0" VPOS="123644.0"
CONTENT="The" WC="1.0"/>
>       <SP WIDTH="-244.0" HPOS="1560.0" VPOS="123644.0"/>
>       <String STYLEREFS="ID4" HEIGHT="1914.0" WIDTH="424.0" HPOS="1664.0" VPOS="123711.0"
CONTENT="female" WC="1.0"/>
>       <SP WIDTH="184.0" HPOS="1480.0" VPOS="123644.0"/>
>       <String STYLEREFS="ID4" HEIGHT="2174.0" WIDTH="240.0" HPOS="2192.0" VPOS="123711.0"
CONTENT="lays" WC="1.0"/>
>       <SP WIDTH="104.0" HPOS="2088.0" VPOS="123711.0"/>
>       <String STYLEREFS="ID4" HEIGHT="1981.0" WIDTH="360.0" HPOS="2528.0" VPOS="123711.0"
CONTENT="about" WC="1.0"/>
>       <SP WIDTH="236.0" HPOS="2292.0" VPOS="123711.0"/>
>       <String STYLEREFS="ID4" HEIGHT="1855.0" WIDTH="216.0" HPOS="3000.0" VPOS="123770.0"
CONTENT="140" WC="1.0"/>
>       <SP WIDTH="112.0" HPOS="2888.0" VPOS="123711.0"/>
>       <String STYLEREFS="ID4" HEIGHT="1729.0" WIDTH="284.0" HPOS="3316.0" VPOS="124223.0"
CONTENT="eggs" WC="1.0"/>
>       <SP WIDTH="100.0" HPOS="3216.0" VPOS="123770.0"/>
>      </TextLine>

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