Re: Monitor calibration software for OS9 computer
Re: Monitor calibration software for OS9 computer
- Subject: Re: Monitor calibration software for OS9 computer
- From: Nipat Paiboonponpong <email@hidden>
- Date: Fri, 18 Sep 2009 06:02:30 -0700 (PDT)
I've tested that with a Powermac G4 MDD.
Video cards: GeForce 4 MX 32MB and Radeon 9800 Pro 128MB.
Monitors: Sony PS400 (VGA), ACD 20" (DVI)
OS: X (can't remember which version)
Analog outputs of the two cards hooking to the PS400 were
clearly different. But the digital outputs from them with an ACD 20" were identicle.
I compared them with pictures taken with a digital camera, layered them
in Photoshop with Difference blending mode.
Nipat
----- Original Message ----
From: Graeme Gill <email@hidden>
To: ColorSync <email@hidden>
Sent: Friday, September 18, 2009 7:16:29 AM
Subject: Re: Monitor calibration software for OS9 computer
Chris Protopapas wrote:
> When you make a monitor profile, what you're actually profiling is the
> combination of monitor and video card, so importing a profile from another
> computer may not work so well. If you can, switch the video card as well.
Has anyone actually ever seen a difference due to a video card ?
Unless they have some sort of "enhancement" image processing setting engaged,
they should be interchangable, since they are nothing more than a frame
buffer and a linear D/A converted (or not even that if it's a
digital connection to the display). Differences between 8 bit
D/A converters is not something that is likely to be captured
easily by calibration, since you'd be hard pressed with modern technology
to produce an 8 bit converter that wasn't accurate to better than
0.5 lsb, and display variation and instrument repeatability errors
will swamp this.
Graeme Gill.
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