RE: Disabling colour management for a display
RE: Disabling colour management for a display
- Subject: RE: Disabling colour management for a display
- From: Roger Breton <email@hidden>
- Date: Fri, 04 Jan 2013 00:08:34 -0500
I doubt a display profile is applied to a video signal on the Mac?
If you open the profile that you think is used to manage the signal, in
ColorSync Utility, if you find the VCGT does not have linear curves, I would
say you have a case. But I have my humble doubts.
If you want to be sure no transform occurs, select a generic profile like
sRGB which does not contain any calibration to my knowledge.
An alternative is to run the software from a different OS...
Best / Roger
-----Original Message-----
From: colorsync-users-bounces+graxx=email@hidden
[mailto:colorsync-users-bounces+graxx=email@hidden] On
Behalf Of email@hidden
Sent: Thursday, January 3, 2013 11:57 PM
To: email@hidden
Subject: Disabling colour management for a display
Hi,
I'm trying to use my MacBook Pro to send calibration patterns to an HDTV
over a TB->HDMI cable. These patterns are to be read from the screen using
a DTP-94 and ColorHCFR, a free display calibration tool.
However, it's essential that these patterns reach the HDTV unmodified, and
as far as I'm aware OS X applies a display profile to all outgoing video
signals. As a result, the video patterns would differ from what was
expected and so the calibration would be affected.
So, first question: am I right in assuming that a display profile is always
applied? OS X seems to assign a generic profile no matter what I do, but
maybe it simply acts as a passthrough?
Second question: if I'm right and OS X always assigns a modifying display
profile to any given display, is there any way of disabling it, even
temporarily?
Thanks.
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