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Topic: Re: Reducing file size for the web (Via Email)
Conf: (P-PDF) Beginners, Msg: 82013
From: LeonardR
Date: 2/23/2003 12:01 PM

At 7:23 AM +1100 2/23/03, p-pdf-beginners Listmanager wrote:
>Size is definetly a PDF downside especially with scanned or rastor PDFs.

Size can be a problem with ANY PDF if poorly written tools
were used to create it, or the wrong settings were chosen...


>Couple options exist though, if you're using scanned images, try to
>avoid color (really blows up PDF size)

Very good recommendation...


> if you must use color use jpgs or pngs,

PNG is not a native PDF format - it gets converted to a
standard PDF raster image with Zip/Flate compression.

JPEG for photographs is certainly the way to go.


>use group4 tiff compression for scan settings for B&W material.

Definnitely.


>If using image+hidden text PDFs try to standardize embedded fonts.
>Messy OCR information can make a 75% or more size difference

Not only that, but many OCR products (esp. Adobe's own
Capture) can generate a LOT of extra, unnecessary, incorrect stuff
into a PDF file.


>For general issues, check out Pit Stop from enfocus. Very good tool
>for prefighting PDFs before release for size, versions, etc.
>

PitStop is a great tool for preflighting prepress related
issues, but it does NOT do much to really help you find problems in
large PDF's.

PDF Enhancer (http://www.pdfsages.com/enhancer.html) is a
product that is designed to find the problems, errors, redudant
information, etc. in a PDF file and remove it - to produce the
happiest, smallest PDF's. I highly recommend that you look into it.


Leonard
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Leonard Rosenthol
Chief Technical Officer
PDF Sages, Inc. 215-629-3700 (voice)
215-629-0789 (fax)