Re: Turn off color management!
Re: Turn off color management!
- Subject: Re: Turn off color management!
- From: Roy Harrington <email@hidden>
- Date: Tue, 08 Mar 2016 19:02:36 -0800
It's a little bit of both. In Epson e.g. You select Premium Gloss so
driver tells OS it wants PGloss ICC Profile. But say PS has custom Baryta
ICC selected. So it converts to Baryta ICC but marks it as PGloss. So OSX
leaves it (null conversion) as is and sends it to driver. For the apps
which have NoCM just mark with PGloss and no conversion is done.
The trick is knowing the paper and thus ICC that is selected in driver
before sending data from the app to OS.
Roy
On Tuesday, March 8, 2016, Graeme Gill <email@hidden> wrote:
> Roy Harrington wrote:
> > Null transform depends on the application knowing what the driver has
> > specified as the destination profile. So there has to be agreement on how
> > this is passed "upstream". I know this is how Epson driver works - I
> > imagine this is what canon did not do until latest versions.
>
> That's what I would suspect - but it would be good to know exactly
> how this occurs. If the OS is the custodian of the printer profiles,
> and is doing the color management on the printer drivers behalf,
> how is it possible for this to occur ?
>
> It only seems feasible if the printer driver is the custodian of the
> printer profiles, and is invoking ColorSync itself internally to do the
> color management, and is not being truthful about what printer profile
> is actually currently selected for the device.
>
> Graeme Gill.
>
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