Re: ColorSync preferences, Preview issues
Re: ColorSync preferences, Preview issues
- Subject: Re: ColorSync preferences, Preview issues
- From: John Zimmerer <email@hidden>
- Date: Sun, 20 Jun 2004 01:08:56 -0700
Upgrade to 10.3.4.
I performed exactly what you detailed, and I got files with embedded
profiles. With the right numbers.
JZ
On Jun 18, 2004, at 12:16 PM, Chris Murphy wrote:
On Jun 18, 2004, at 12:06 PM, Chris Murphy wrote:
On Jun 17, 2004, at 3:35 PM, John Zimmerer wrote:
Preview uses Quartz, and therefore:
1) Benefits from embedded profiles.
So long as you open images in Preview. If you save images from
Preview, it's lethal to good color management practice.
1. Open a tagged TIFF, and resave as TIFF (use Save As). The resulting
TIFF is untagged.
2. Open a tagged TIFF, and resave as JPEG (use Export). The resulting
JPEG is untagged.
2. Open a tagged TIFF, and resave as JPEG 2000 (use Export). The
resulting JPEG is tagged sRGB regardless of the original source
profile.
3. Open a tagged TIFF, and resave as PDF (use Export). The resulting
PDF is tagged Generic RGB regardless of the original source profile
And on top of that, they've all been converted to a common
destination. They all have identical numeric values among them, but
are completely different than the numeric values in the original file.
It appears the file was converted from embedded source to monitor RGB,
and then either no profile was subsequently embedded (TIFF and JPEG),
and a bogus profile was embedded for the others (JPEG 2000 and PDF).
Ummm - JOHN?!?! This is not a healthy application.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0-201-77340-6)
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