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Thread started 31 Aug 2016 (Wednesday) 19:01
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DNG Camera Color Profiles for Samsung Galaxy S7. Questions.

 
Dmitriy
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Aug 31, 2016 19:01 |  #1

1. When I open RAW files taken with S7 in Lightroom the default profile is "Embedded". I don't think there really is a profile embedded as it seems way off. I think if you import a JPG it will also show "Embedded". So, there is no DNG Camera Color Profile for S7, is there?

2. Are there other Samsung Galaxy S7 color profiles to download?

3. Has anyone created profiles for S7 with / or can take pictures of ColorChecker Passport with S7?


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tzalman
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Sep 01, 2016 07:31 |  #2

1. When I open RAW files taken with S7 in Lightroom the default profile is "Embedded". I don't think there really is a profile embedded as it seems way off.

If there were no profile embedded, Adobe would have to create and supply a profile, because without one you wouldn't see a color image on your screen - the application of a camera profile is the necessary first step in using Raw data to create a color image. When camera makers use their own proprietary Raw formats (CR2, NEF, ARW, etc.) they may embed their own profile or more usually they embed a number of profiles in the conversion software they supply. In either case it is not available to Adobe. Therefore, Adobe has to create at least one profile (called Adobe Standard.dcp) and for the leading brands and models they also create several more that are back-engineered imitations of the maker's profiles. But when the camera maker uses the DNG format (Adobe's own but open) they don't need to provide the conversion software, so they may decide to embed the profile so that it will be available to any software that can open and process DNGs, thus relieving Adobe of the need to provide one. Theoretically at least, this should be better than Adobe making the profile, so it is strange that you think it is "off". Perhaps you think that because you need to do some LR adjustments beyond merely opening the file, Try the Auto Tone button, for instance.


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Dmitriy
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Sep 03, 2016 12:24 |  #3

LR adjustments can help fix an image with technical errors or enhance it. That is a separate matter.

Profiles contain color tables and matrices, correction matrices (and other types of matrices I don't really understand). Profiles store raw data mapping for a particular camera sensor and help with processing those values into a "normal" image (as that particular camera supposed to see it).

By "off" I meant color casts and color shifts.

Example, take a photo with your camera as both RAW and JPG. Import the RAW file in Lightroom and change "Adobe Standard" to "Camera Standard" under "Camera Calibration". Compare these JPG and RAW files. They should be pretty much identical. This is because that profile helps LR process RAW data the same way as your camera processes it into JPGs.

This isn't the case with S7's DNGs. The embedded profile (it can be just Adobe standard, without any reference to the sensor) produces very different results from the camera's processor. Not only the result is different, in some cases, it is noticeably unnatural and difficult to fix.


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DNG Camera Color Profiles for Samsung Galaxy S7. Questions.
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