From: Aditya Mahajan <adityam@umich.edu>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: shrink JPGs to some resolution (dpi) ?
Date: Mon, 9 Mar 2015 17:47:44 -0400 (EDT) [thread overview]
Message-ID: <alpine.LNX.2.03.1503091742170.1317@hzvpu.rqh> (raw)
In-Reply-To: <20150309211224.GA11660@hl.fritz.box>
> Hi,
>
> is it possible that context (lua?) will "shrink" all \externalfigure jpegs
> automatically to some specified dpi resolution and quality
> (e.g. 300 dpi with 95% jpeg 'quality' for print and
> 100 dpi and 75% for screen quality) ?
>
> [....]
>
> any hints to read the original large JPGs, but only write "print quality" 300dpi images,
> or low quaity 75dpi images for speed (and saving net bandwidth when mailing PDFs
> to co-workers of the group)?
Why not eliminate the orignal high quality jpegs altogether? Use
imagemagick or your favorite photo batch processor to convert all the high
quality jpegs to low quality jpegs.
Say you have directories images/print that contain 300dpi images and
images/screen that contain 100dpi images. Then you can use:
\setupexternalfigures
[directory={images/print}]
\startmode[screen]
\setupexternalfigures
[directory={images/screen}]
\stopmode
Run with context --mode=screen to get low-resolution images.
Aditya
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next prev parent reply other threads:[~2015-03-09 21:47 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-09 21:12 Harald Koenig
2015-03-09 21:47 ` Aditya Mahajan [this message]
2015-03-09 23:33 ` Harald Koenig
2015-03-10 0:05 ` Hans Hagen
2015-03-09 21:50 ` Alan BRASLAU
2015-03-09 22:10 ` luigi scarso
2015-03-09 22:25 ` Hans Hagen
2015-03-09 23:18 ` Harald Koenig
2015-03-10 0:17 ` Hans Hagen
2015-03-10 1:33 ` Harald Koenig
2015-03-10 6:34 ` Henning Hraban Ramm
2015-03-10 11:12 ` Hans Hagen
2015-03-09 21:54 ` Pablo Rodriguez
2015-03-10 6:44 ` Peter Münster
2015-03-10 7:43 ` Harald Koenig
2015-03-10 9:08 ` Peter Münster
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