Re: DigitalColor Meter (was Color accurate workflows and in search of a D50 Editing colorspace)
Re: DigitalColor Meter (was Color accurate workflows and in search of a D50 Editing colorspace)
- Subject: Re: DigitalColor Meter (was Color accurate workflows and in search of a D50 Editing colorspace)
- From: edward taffel <email@hidden>
- Date: Wed, 10 Sep 2014 11:36:59 -0400
sampling display color is certainly efficacious in establishing some cm workflow parameters as regards displays.
however, it [still] seems to me, a sampling tool should offer an image-data sample-mode: e.g., it is desirable to sample colors in an image’s space to find a suitable harmonizing color for other design elements; sampling values that have been converted to a display space (& possibly converting back to cmyk) will likely be off—they will almost certainly appear different on press.
On Sep 10, 2014, at 10:55 AM, Andrew Rodney <email@hidden> wrote:
> New test. Made a document in Adobe RGB with a value of 0/240/0. Photoshop of course shows that value in the info palette.
> I then save that with the embedded profile to the desktop as a TIFF.
>
> I open the document in Preview and check both values using Photoshop and DigitalColor Meter:
> I use DigitalColor Meter and set it for Display Native Value and get 0/231/0.
> I use Photoshop's sampler tool to read the color, it shows the same number 0/231/0.
> I open the DigitalColor Meter and set it for Display in Adobe RGB (which matches the document), I get 10/239/37! So that's useless!
>
> Photoshop and DigitalColor Meter read the same values when DigitalColor Meter is set to Display Native Values. DigitalColor Meter set for Adobe RGB is way off.
>
> In the finder (10.9.4). I click the space bar to show the image using the Finder. Visually it does match what I see in Photoshop! The Finder seems totally confused about how to preview this data using Quick Look (whatever it is called when clicking spacebar to show the preview, presumably from the thumbnail?) or CoverFlow. DigitalColor Meter shows 135/233/74.
>
> So the data being sucked up and read by Photoshop and Digital ColorMeter are incorrect (begging the question, why read such values, they are wrong). Photoshop does provide a conversion to CMYK based on the numbers it picks up outside it's UI and Lab.
>
> There is one condition where Photoshop and DigitalColor Meter agree. That's when DigitalColor Meter is set to Display in L*a*b*!
>
> Andrew Rodney
> http://www.digitaldog.net/
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