Jpg has loseless in the spec. Photoshop jpg set to 12 is loseless
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-------- Original message --------
From: "Emily L. Ferguson" <elf@xxxxxxxxxxxxxxxxxx>
Date: 08/27/2013 8:18 AM (GMT-08:00)
To: List for Photo/Imaging Educators - Professionals - Students <photoforum@xxxxxxxxxxxxxxxxxx>
Subject: Re: jpg
My understanding is that jpg compression achieves smaller filesize by
discarding data. I've never heard of exceptions to that at any level
of jpegging.
You can confirm that by examining a file at the pixel level, but why
argue? If you wish to retain all the data the camera collected, just
don't jpg. If you feel you don't need all the data, the issue is
moot.
My pro shooter's opinion was that the publisher was going to be
receiving a jpgged file from him anyway, and that magazine quality
print wouldn't be able to reproduce the minutiae of uncompressed data
anyway, so wotthehell.
I'm not sure he does "art" shows of his work, too. He's been an
editorial National Geographic photographer all his life.
--
Emily L. Ferguson
mailto:elf@xxxxxxxxxxxxxxxxxx
508-563-6822
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