Lightroom: Large color changes after iPhone dng files sync to desktop

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  • Updated 2 years ago
  • (Edited)
After I shoot a dng file with my iPhone 6s, I edit a bit on my phone or iPad to get a good image. However, if I then open my desktop machine, the image syncs and drastically changes color to much darker and duller and also lens corrections get applied. A little later, the image gets synced back to mobile and there it darkens too. This is not due to a default set or somesuch as the slider settings in the desktop are the same as on the mobile side. The color improves if I choose the "embedded" profile in the calibration setting away from the camera default that is set I Lightroom but not all the way to how I edited it on the mobile side. Of course on the mobile side you unfortunately cannot choose a profile. It seems there is a dng profile issue between the platforms.
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Jao van de Lagemaat

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Posted 2 years ago

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Rikk Flohr, Official Rep

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Can you take a screenshot of the differences in the color and post it here?
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Jao van de Lagemaat

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Sure! I am not near my photography computer right now, so I can't give you that until later tonight but I discovered in the mean time that the same color shift happens upon sharing out an image from Lightroom mobile such as saving to the camera roll. Here is an example of the view in Lightroom mobile:

This looks very close to the colors in real life and it looks the same on my iPad Pro when it synced to that. However, when I export to the camera roll, this is what I get:

As you see the shadows are plugged and the yellows have changed hue. The colors look the same (and different from the dng) if I reimport this jpeg into Lightroom so it is not some color management issue. This also looks like what I get when synced to my desktop. I will take this same image on my desktop later and show that. Needless to say this is a real issue if I edit my dng files in the field.
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Jao van de Lagemaat

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Here is the rendering synced to Lightroom Desktop. It first shows the version with the non-plugged shadows for a few seconds and then transitions to the dark version.
It is interesting that apparently the export from Lightroom mobile gives the darker version and that the initial display in Lightroom Desktop is identical to the brighter rendering, suggesting that there is a dng profile mismatch somewhere.
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Rikk Flohr, Official Rep

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Jao, can you describe your monitor/video setup on the desktop? Is it wide-gamut? Does it have a significant portion of the P3 color space represented? 
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Jao van de Lagemaat

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Yes wide gamut. I converted from monitor profile to sRGB for the screenshot above but as I said, it seems to be on the mobile side where the problem actually is as when I export/share from LR/mobile, the color of the export is different from what is seen in LR/mobile. This is a iPhone 6Splus with iOS completely up to date.
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Rikk Flohr, Official Rep

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Jao, thanks for the info.

Is it possible for you to copy this DNG ito a collection called "For Adobe" on your mobile device and we will take a look at it on the back end?
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Jao van de Lagemaat

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Ok done as asked. This is a dng from the same place that I haven't touched at all on my desktop to make sure you'll see the same effect.
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Rikk Flohr, Official Rep

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Great. Please leave it there for at least 24 hours so our engineer can take a look.
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Jeffrey ODonald, Program Manager, ACR

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Hey Jao. Can you confirm the version of Lightroom that you are using on your desktop when this occurs?
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Jao van de Lagemaat

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It's 2015.7
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Jeffrey ODonald, Program Manager, ACR

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Thank you! We're discussing this and trying to figure out what's going on. Appreciate the report and all of the info you've provided.
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Guido Reule, Employee

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Within our current Lr Mobile implementation we use the ios-dng-embedded-jpeg as a preview and as soon we start to render the preview ourselfs we use Adobe Camera Raw and we apply a  camera profile but this is not adaptive to the scene content like the ios embedded jpegs. We are working to fine tune this and bring down the differences you are seeing.  - Guido
(Edited)
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Jao van de Lagemaat

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Guido, the problem is that when I edit in mobile it keeps the lighter appearance even in the edit screens. I can apply gradient filters, do shadows and highlights and such and it stays at the brighter shadow appearance. If it were the issue with the jpeg preview from iOS the appearance should change as soon as I go into Edit on mobile. It doesn't. However, when I share from mobile to the camera roll, the resulting jpeg has the darker shadows while in LR/mobile the appearance stays like it was original. Also when I sync over, the appearance changes on the desktop side. If I now do changes on the Desktop, and sync them back then the appearance on LR/mobile changes to the darker appearance. It is almost as if the mobile Lightroom keeps using a different dng profile until it gets synced back from the Desktop Lightroom.
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Rinus Borgsteede

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Check the display Gamma! Devices rarely match. Also turn off the auto brightness adjustment of mobile devices. Upload a Gamma ramp to your devices and adjust your mobile device to the same file shown on your computer. DNG files are likely Adobe RGB.while changing to sRGB affects Color and brightness. If you want proof which is right, purchase a calibration tool for your computer and never again adjust on a mobile device.