[argyllcms] Re: Compatibility with i1 (Eye One) Display Pro 3 retail and OEM?
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 10 Feb 2012 00:25:09 +1100
Kristian Jörg wrote:
> Yes. But when you are profiling a monitor for gamma tracking. Do you not
> measure *luminance* to
> create a profile that will contain the corrections neccessary to obtain that
> gamma tracking. I am
> just trying to get the grips here...
Yes, but it's relative. Relative means that the values get normalized to
the maximum/white. So any error in the absolute level is ignored.
Example:
Instrument A measures:
100.0 cd/m^2 at 100%
35.0 cd/m^2 at 50%
that's a gamma of 1.514 [log(35/100)/log(.5)]
Instrument B has an error of 10%:
110.0 cd/m^2 at 100%
38.5 cd/m^2 at 50%
that's a gamma of 1.514 [log(38.5/110)/log(.5)]
Graeme Gill.
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