Galaxy Note 10 Color Mangagement Input Profile

Software ART
1

Hi,
which input profiles in ART should I use if I want to develop DNG images from Samsung Galaxy Note 10?

I made my own Tone Curve, but it would be nice if there was something like “Auto-Matched Tone Curve” to start with. My example is certainly quite hard and dark, but I like that in this photo.

My question: which setting should you take with a camera that is not supported by default? Of course you can choose Camera standard or Embedded. But is there the option for the curve embedded in the JPEG?
Galaxy_Note_10.dng.arp (11.5 KB)

Galaxy_Note_10_ART
Galaxy_Note_10_ART3016×4024 4.68 MB

Galaxy_Note_10.dng (23.8 MB)

2

I think if ART can read embedded profile of the Raw file, you should use the embedded profile. However it seems that ART (or other FOSS raw processors) cannot read embedded profile of Samsung Galaxy Note 10 Raw file. And your file does not contain any jpeg preview image, so Auto-Matched Curve is not available.

1 Like
3

Yes, that could be. I’m surprised that the Samsung .dng doesn’t seem to have an embedded Jpeg that looks like the Jpg ooc. Well, if the “Auto-Matched Tone Curve” doesn’t work here, that’s no bad thing. Then you just have to do a bit of work to create a curve yourself that does justice to the shot. Since I only take my photos with my smartphone in an emergency, it’s not a big deal. I just wanted to make sure whether I just didn’t find the function I wanted or whether it simply doesn’t exist.

Yasuo, thank you, now I don’t have to look any further if this function doesn’t exist.

4

Recent smart phones use complicated photo processing, such as “AI” or something, and I think the manufactures want to keep their “recipe” of photo processing secret in order to differentiate themselves from other camera or phone companies. So they will not disclose their Raw file metadata information without Signed Non-Disclosure Agreement.

5

You can/should run exiftool -a -u -s -G1 on your DNG to see what it actually contains.

6

Hello @yasuo
Good, I can live with it as it is. I’m positively amazed at how well you can develop the dng from the smartphone with ART anyway. As I said, I only use this phone when I don’t have my real camera with me.

7

Oh dear, you can display a lot of things there. What could you search for specifically? A tone value curve is probably not displayed.
II have only discovered a TIFF and no Jpg: TIFF-EPStandardID : 1.0.0.0

8

That’s the point. :wink:

The fact there is

[SubIFD]        SubfileType                     : Reduced-resolution image

tells you there is a preview image embedded. However, it’s been known that at least on some Samsung models this image (or the way it is embedded) is broken and inaccessible…

Next,

[IFD0]          ColorMatrix1                    : 0.7861328125 -0.1591796875 -0.142578125 -0.609375 1.54296875 0.033203125 -0.2568359375 0.513671875 0.4423828125
[IFD0]          ColorMatrix2                    : 1.573242188 -0.7939453125 -0.34375 -0.4794921875 1.615234375 -0.2490234375 -0.0673828125 0.3291015625 0.521484375
[IFD0]          CameraCalibration1              : 0.9501953125 0 0 0 1 0 0 0 0.9931640625
[IFD0]          CameraCalibration2              : 0.9501953125 0 0 0 1 0 0 0 0.9931640625
[IFD0]          CalibrationIlluminant1          : D65
[IFD0]          CalibrationIlluminant2          : Standard Light A
[IFD0]          ForwardMatrix1                  : 0.6435546875 0.046875 0.2734375 0.2548828125 0.6689453125 0.076171875 0.0556640625 -0.5712890625 1.340820312
[IFD0]          ForwardMatrix2                  : 0.5 0.0576171875 0.4072265625 0.119140625 0.6337890625 0.2470703125 -0.0595703125 -0.9248046875 1.810546875

tells you there is only a subset of the Adobe DCP embedded, and indeed no tone curve (ProfileToneCurve tag, see DNG spec.)

9

@kmilos

It’s amazing what you know! Do you think you could use the information in the jpg taken at the same time to create this Auto-Matched Tone Curve? Or, what would be even better? How do you build such a curve yourself? I always try around a bit, looking at the from of the curve and of course the image at the same time. Do you know a sensible method for creating a usable curve like this?