Re: Colormanagement: Bugs, bugs, bugs ... :-(
Re: Colormanagement: Bugs, bugs, bugs ... :-(
- Subject: Re: Colormanagement: Bugs, bugs, bugs ... :-(
- From: Chris Cox <email@hidden>
- Date: Mon, 31 Jan 2011 15:49:20 -0800
- Acceptlanguage: en-US
- Thread-topic: Colormanagement: Bugs, bugs, bugs ... :-(
On 1/31/11 3:37 PM, "Klaus Karcher" <email@hidden> wrote:
>>>> 1.) Photoshop's Color Settings Panel has serious bugs. Sometimes the
>>>> panel neither reflects Photoshop's actual settings nor the
>>>> synchronization state correctly. As soon as one starts to play with
>>>> conversion options (e.g. toggles compensate for scene-referred profiles
>>>> and black point compensation or changes the rendering intent), Photoshop
>>>> behaves more or less erratic. It can happen that Photoshop ends up in a
>>>> state where neither the display nor the results are correct or where the
>>>> display is correct, but the Lab values in the info panel are wrong.
>>>> These nasty bugs should be fixed as soon as possible, the more so as
>>>> they date back at least until CS4.
>>
> Chris Cox wrote:
>> Odd that nobody has filed a reproduceable bug like that with Photoshop.
>> We've seen claims like that before, but every time it was a misunderstanding
>> on the customer's part.
>
> Are the screencasts and example files enough or should I file an
> "official" bug report? (did you ever try to explain a mess like this in
> a reproducible way in few words? in a tiny web form? in a foreign language?)
Use the official bug report form, and include as much detail as needed.
If you find it easiest to explain in your native language - do that, and
we'll translate it.
And to answer your questions: yes, yes, and yes. It is most fun when I
have to ask someone else to translate my explanation into a language I don't
speak/write - but we deal with a lot of languages around here. I constantly
have to write bug reports for third party vendors who are causing crashing
in Photoshop or writing files incorrectly, many of whom don't have people
around to translate my report.
>>>> 2.) Some profiles seem to trigger Photoshop's
>>>> scene-referred-to-output-referred compensation by mistake.
>>
>> The profile has to be marked as scene referred before ACE will treat it as
>> scene referred.
>> We have seen several calibration tools incorrectly mark profiles as being
>> scene referred when they were not.
>
> All envolved profiles (including the monitor profile) are ICC V 2.x.
> There is no ciis tag as far as the eyes can see.
Then we need examples for Manish and his team to examine.
A bug report would be good, or you can just email them to myself and Manish.
>>>> 3.) Even though the "compensate for scene-referred profiles" setting
>>>> seems to be part of the Color Settings File and hence should be
>>>> synchronized across all CS applications, it can cause inconsistent
>>>> results. Either InDesign and Acrobat simply ignore the setting or they
>>>> are not "bug-compatible" with Photoshop.
>>
>> Only Photoshop and After Effects use that option, as documented.
>
> Apparently the bug is linked to Photoshop's "compensate for
> scene-referred profiles" option. The only way to get consistent and
> reproducible results with the profiles I mentioned is to deactivate the
> option.
Yes, if the profiles are bad and triggering the scene referred processing
somehow, then they could cause problems in Photoshop and After Effects.
>>>> 4.) The PDF/X-4 Preset in CS5 is buggy: The embedded profile is based on
>>>> FOGRA39, but the Output Condition Identifier is "FOGRA27".
>>
>> Again, file a bug so we can fix it.
>> If you don't tell us about bugs, they won't get fixed.
>
> I just filed a bug report concerning the PDF/X-4 preset.
Thank you.
Chris
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