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Re: PDF generation, do not compress already compressed images?

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From	Helge Blischke <h.blischke@acm.org>
Newsgroups	comp.lang.postscript
Subject	Re: PDF generation, do not compress already compressed images?
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Date	Sat, 11 Oct 2014 21:29:05 +0200
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mathog wrote:

> jdaw1 wrote:
>> This is a PostScript forum, and your question is about PDFs. The question
>> is fine, but should be re-posted elsewhere.
>>
> 
> Well, yes, but this is also the forum for ghostscript questions, and
> ghostscript is one tool that might be used to take a PDF containing
> a mix of compressed and raw images and selectively apply compression
> to the raw ones.  Ghostscript is also the program underneath some of the
> free PDF printer drivers, like PDFcreator, so if ghostscript
> does have this capability, it might be reflected somewhere in the
> option for that driver.
> 
> Regards,
> 
> David Mathog

I suspect it is due to the quality and format of the original images. The 
PDF export of Keynote only offers three quality levels for embedded
images without detailed information what it does then.

Helge

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PDF generation, do not compress already compressed images? mathog <dmathog@gmail.com> - 2014-10-08 13:51 -0700
  Re: PDF generation, do not compress already compressed images? jdaw1 <jdawiseman@gmail.com> - 2014-10-09 01:31 -0700
    Re: PDF generation, do not compress already compressed images? mathog <dmathog@gmail.com> - 2014-10-09 10:21 -0700
      Re: PDF generation, do not compress already compressed images? Helge Blischke <h.blischke@acm.org> - 2014-10-11 21:29 +0200

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