Re: JPEG to PDF question

From	Eli the Bearded <*@eli.users.panix.com>
Newsgroups	comp.lang.postscript
Subject	Re: JPEG to PDF question
Date	2019-04-12 00:33 +0000
Organization	Some absurd concept
Message-ID	<eli$1904112032@qaz.wtf> (permalink)
References	<eli$1904061719@qaz.wtf> <AA2A973D375D4EAC2E284CEEC009E394A9D7@127.0.0.1> <87d0lsfbjr.fsf@hemphills.net>

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In comp.lang.postscript, Scott Hemphill  <hemphill@alumni.caltech.edu> wrote:
> You can also use netpbm tools, along with Ghostscript's ps2pdf:
> 
> djpeg in.jpg | pnmtops | ps2pdf - out.pdf
> 
> In my CentOS distribution, djpeg is from libjpeg-turbo-utils,
> pnmtops is from netpbm-progs, and ps2pdf was already installed from
> ghostscript.

Hmmm. I have all of those installed, but I deleted the statement.jpg I
was using for the previous testing. Using a different JPEG from my temp
directory I see:

81K JPEG -> djpeg -> 958K PPM (binary encoded raw bitmap)
958K PPM -> pnmtops -> 2.0M PS (ascii encoded raw bitmap)
2.0M PS -> ps2pdf -> 41K PDF (embedded binary JPEG)

And the PS has the image rotated ninety degrees counter-clockwise
(which, naturally, remains turned in the PDF). The image in this case
was landscape format, and is now portrait format. My statement.jpg had
been portrait oriented to begin with.

The PDF has a lot of JPEG artifacts. I'd probably want to check the
output carefully if using this for submitting photos of documents
through web portals.

Elijah
------
didn't see any options for selecting JPEG compression

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Thread

JPEG to PDF question Eli the Bearded <*@eli.users.panix.com> - 2019-04-06 21:33 +0000
  Re: JPEG to PDF question John Forkosh <forkosh@panix.com> - 2019-04-07 06:39 +0000
  Re: JPEG to PDF question Guy <guy@guysalias.tk.invalid> - 2019-04-07 14:52 -0500
    Re: JPEG to PDF question Eli the Bearded <*@eli.users.panix.com> - 2019-04-07 21:54 +0000
      Re: JPEG to PDF question ken <ken@spamcop.net> - 2019-04-08 10:30 +0100
      Re: JPEG to PDF question Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-04-08 10:24 -0600
      Re: JPEG to PDF question Javier <invalid@invalid.invalid> - 2019-04-10 18:10 -0500
        Re: JPEG to PDF question luser droog <luser.droog@gmail.com> - 2019-04-10 18:01 -0700
        Re: JPEG to PDF question ken <ken@spamcop.net> - 2019-04-11 10:50 +0100
    Re: JPEG to PDF question Scott Hemphill <hemphill@hemphills.net> - 2019-04-11 17:59 -0400
      Re: JPEG to PDF question luser droog <luser.droog@gmail.com> - 2019-04-11 16:03 -0700
      Re: JPEG to PDF question Eli the Bearded <*@eli.users.panix.com> - 2019-04-12 00:33 +0000
        Re: JPEG to PDF question Mark Carroll <mtbc@bcs.org> - 2019-04-12 07:15 +0100
  Re: JPEG to PDF question orr721@gmail.com - 2019-06-16 07:11 -0700

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