Re: Anomaly between Photoshop 7.0.1 and 6.0.1
Re: Anomaly between Photoshop 7.0.1 and 6.0.1
- Subject: Re: Anomaly between Photoshop 7.0.1 and 6.0.1
- From: email@hidden
- Date: Mon, 09 Sep 2002 08:49:25 -0700
Hi Bruce,
OK, it wasn't a bug. Notice that Tom says that this limitation in PS
6 only applied to one-way input profiles, but the profiles I was
testing are not one-way input profiles. They are two-way profiles,
and the limitation does apply to them in PS 6. Oh well, close enough.
Besides, the main point of my original observation to Paul was with
regard to the source simulation behavior, which is what broke in my
system as a result of the change to a different default intent for
source simulations (percep to relcol). I like the architecture as it
is now. What do you think about the change of the source simulation
behavior? If it's right, maybe Apple should copy Adobe with the
small tweak.
Interesting background though, thank you. We still do get into a
potential mess, what with the lack of control over the rendering
intent of each transformation into or out of the PCS, as we have
discussed previously, at least if anybody wants to have more than one
intent facilitated in a source profile (counting the colorimetric
intents as one). Perhaps the solution is just to always provide a
colorimetric table only, or in the relevant situations to just make
sure all three tables are identical, especially when you expect to
convert all the way from the source profile to a printer profile.
The current implementation would be especially nice for converting
from a multiple-intent scanner or DCam profile into an RGB working
space.
Recall my earlier idea for ICC support of a "certified intent" scheme
whereby profile making apps would label each tag in a profile with a
Yes or No, meaning the tag does or does not actually refer to data
which can provide the intent suggested by the name of the tag, and
this information then being usable in the interface during
conversions to make complete information for ther user possible,
instead of this hodgepodge of determination partially controlled by
the profile and partially controlled by the interface, with the user
being especially unlikely to be able to have certainly about the
intent of each step. Sticking to RelCol in the source to PCS step
solves the problem for input conversions, but still, there are other
situations (like using a proofer along with a printer, or even
sometimes just when doing a soft proof) where being able to specify
and be certain of the intent for each step would be preferable.
Thanks for digging up Thomas' reply.
Joe
email@hidden
At 5:42 PM -0700 8/7/02, Thomas Knoll wrote:
The ICC changed the spec to allow multiple intents for scanner
(i.e. one-way) profiles after Photoshop 6 shipped and before
Photoshop 7 shipped. We support this new feature in Photoshop 7.
If the source profile is two-way, multiple intents where always
supported. The change is only for one-way input profiles.
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.