[argyllcms] Re: Homebrew ColorChecker
- From: Pascal de Bruijn <pmjdebruijn@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 13 Feb 2010 20:36:54 +0100
On Sat, Feb 13, 2010 at 8:21 PM, Ben Goren <ben@xxxxxxxxxxxxxxxx> wrote:
> On 2010 Feb 13, at 11:55 AM, Pascal de Bruijn wrote:
>
>> And another welcome advantage of using something that is near a
>> ColorChecker is that lots of utilities can recognize the chart.
>
> Well...yes and no.
>
> Those utilities assume that the ColorChecker has a certain
> spectral characteristic, which your chart won't have. That is
> to say, you've created a metameric match under D50 lighting
> conditions, but it's a near-certain guarantee that your chart
> won't match a ColorChecker under fluorescent lighting.
>
> It would be educational for you, I think, to compare plots of
> the spectra of your chart with the spectra from an actual
> ColorChecker.
I know about spectra and metameric matches... I'm _guessing_ a strobe
is practically similar-ish to D50...
And I only talked about chart recognition. To get any results at all
an application would have to use my custom measured reference files...
The inkjet prints aren't close enough in any case to be used with the
original reference files...
Regards,
Pascal de Bruijn
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