From: dvd@davidashen.net
To: 9fans@cse.psu.edu
Subject: RE: [9fans] text search in PDF?
Date: Fri, 14 May 2004 19:22:06 +0500 [thread overview]
Message-ID: <c1ca538f2192524b716f2dab5c45ed06@davidashen.net> (raw)
In-Reply-To: <D691F041928C1049808A0670D2252BE006334441@nj9620exch001u.mh.lucent.com>
> it's not strictly PS, though they share the imaging model and "The PDF
> operators for setting the graphics state and painting graphics
> objects are similar to the corresponding operators in the
> PostScript language". Close enough to PS for text searching.
> The main annoyance is that PDF files usually compress their
> content after a short bit of PS-like prolog.
Both Postscript and PDF use text strings to represent strings.
Rare cases when rasterized images of text pages are wrapped
into Postscript or PDF formats are mostly due to a need to
somehow publish scanned documents; or due to faulty conversion
toolchain.
Compression is not a problem. To render a PDF, one has to uncompress
its contents anyway. And decompression is trivial.
The problem is high quality formatting -- most documents which are
kerned are kerned explicitely -- words are broken into parts, and displacements
are set for word parts, which makes searching for whole words impossible.
David Tolpin
next prev parent reply other threads:[~2004-05-14 14:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-14 13:04 Trickey, Howard W (Howard)
2004-05-14 14:22 ` dvd [this message]
2004-05-14 15:47 ` splite
2004-05-14 16:45 ` a
-- strict thread matches above, loose matches on Subject: below --
2004-05-14 6:03 cej
2004-05-14 10:05 ` a
2004-05-14 12:48 ` boyd, rounin
2004-05-14 17:17 ` Lyndon Nerenberg
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