Re: ColorSync and MacOS X: Settings
Re: ColorSync and MacOS X: Settings
- Subject: Re: ColorSync and MacOS X: Settings
- From: John Gnaegy <email@hidden>
- Date: Thu, 14 Feb 2002 14:40:44 -0800
the utility offers to repair the profiles. But do I really want it to
set the white to D50 on those profiles which were built that way?? And
will it really fix the tags properly?
If the tags of a profile don't conform to the spec, ColorSync Utility
raises a warning and can optionally try to repair the profile. As far
as which errors are fixable and which aren't, that depends on how badly
screwed up the tag is. An attempt is made to repair the tag as opposed
to modifying it randomly and hoping for the best...so there is some
thought involved. Still the safest thing is to run Verify first, then
save copies of any profiles with errors before hitting Repair. There's
a caution to that effect in the info text in Profile First Aid. So
there's the standard disclaimer. From personal experience I haven't
found any profiles that were worse after being repaired than before. If
you do find a profile that gets munged by ColorSync Utility let us know,
but we haven't heard of any so far.
The "header WP is not D50" is a minor deviation from the spec, you can
fix that without worries. Since the value is often arrived at through
calculations, differences due to rounding and precision can appear
between one profile maker and another, so the spec suggests copying a
specific D50 value into that field instead of using a calculated value.
If the tag has a calculated value instead of the suggested specific
value, you get the error.
ColorSync Utility is a strict judge of profile correctness, very useful
to developers of profile creation software and developers who ship
profiles. Its ability to repair truly damaged or problematic profiles
is also beneficial to users.
---
John Gnaegy
email@hidden
colorsync
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