Resized images lose embedded sRGB profile

On Fri, 21 Sep 2007, Jesper Nilsson wrote:

> When i downscale images that have an embedded sRGB
profile the 
> profile is lost. When I do the same thing with images
having 
> different profiles like Adobe RGB the profile is not
lost.

This sounds interesting.  If GraphicsMagick is somehow
actually doing 
this, then I would suspect some sort of weird bug.  I am not
aware of 
any JPEG-related code which singles out sRGB profiles
(although other 
apps may intentionally do this).  Other applications may
intentionally 
discard the sRGB profile because the sRGB specification says
that the 
default profile for JPEG shall be sRGB (in order to save
space).

Most file formats do not provide a way to attach ICM color
profiles so 
if you used some intermediate format other than one of the
few which 
do, then the profile would be silently lost.

Are you able to send me a file which causes the problem so
that I can 
try to reproduce the problem here?

Bob
======================================
Bob Friesenhahn
bfriesensimple.dallas.tx.us, http://w
ww.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMag
ick.org/


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