Re: DNG Profile Editor question.
Re: DNG Profile Editor question.
- Subject: Re: DNG Profile Editor question.
- From: Joe <email@hidden>
- Date: Tue, 15 Mar 2016 13:52:22 -0700
Hi, Ben.
First I wish to thank you for your detailed and helpful reply to my questions. It’s been very helpful.
In regards to your question I am concerned with colorimetric accuracy over visual appearance in my specific application. In other words I don’t have a problem if colors appear slightly off on screen as long as I get good readings. I must use the eyedropper in ACR and read colors with colorimetric accuracy so that the values for real life targets are the same I measure from the same color patches on screen.
Adobe Photoshop and ACR are simple tools to use and almost anyone knows a little about them. I would prefer to stay with them as tools even if it means that I have to add another piece of equipment or software for this task in order to create proper and accurate profiles.
I tried the Raw Photo Processor you suggested but found it a bit difficult to use and lacking some of the tools easily available in Photoshop and ACR.
Is there any solution you can recommend ?
Thank you.
> On Mar 14, 2016, at 10:32 AM, Ben Goren <email@hidden> wrote:
>
> On Mar 14, 2016, at 10:13 AM, Joe <email@hidden> wrote:
>
>> In this case what am I doing wrong and how can I improve my calibration process so my measurements on screen are accurate and reflect real life measurements ?
>
> Adobe products are all about "pleasing" color. Colorimetric accuracy is next to impossible using Adobe products -- and DNG profiles especially.
>
> You can sorta kinda get somewhat in the ballpark maybe if you're very patient. And very lucky. But even just getting DNG to _not_ apply a "contrast enhancing" S-shaped tone curve can be an herculean task -- and that's before you get to all the mucking around it does with hue angles and what-not.
>
> (And, in your specific case, you might have an additional layer of confusion to contend with -- depending on what you're using to measure the colors, the display profile might or might not be applied before and / or after your measurements. That is, just simply getting accurate measurements out of an Adobe product can be an exercise in futility.)
>
> I would first recommend making sure you know what it is you're after -- what goal you have in mind. If it's "better" or "more pleasing" color in portraiture or landscape or sports or similar photography, start with the DNG profile and tweak it to your liking. Adobe's tools for that sort of thing are as good as they get.
>
> But if your goal is colorimetric accuracy for fine art reproduction or product photography or the like, I'd strongly recommend against using any Adobe products at all as part of your workflow. Instead, you'll need something such as Raw Photo Processor that both traces its heritage back to Dave Coffin's dcraw and takes color seriously. And the profiles that ship with Raw Photo Processor in particular are better than any you'll be able to make for yourself without a _lot_ of knowledge and expertise and a bit of equipment that you'll either have to make yourself (which can be done very cheaply) or buy for more than you probably spent on your camera.
>
> Cheers,
>
> b&
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