Photo center off color

Discussion in 'Mavic Pro Discussions' started by Romi, Nov 30, 2016.

  1. Romi

    Romi Well-Known Member

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    LRM_EXPORT_20161130_161927.jpg Anyone have a clue why my stills would do this? Shot 51 pictures and they're all off color in the center.
     
  2. halley

    halley Well-Known Member

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    Do you see similar with video? I assume from the downward shot you aren't leaving the gimbal dome on.

    To me it looks like there may be some anti-vignette lens correction going on, and it's too strong, leading to the effect you have. In carefully controlled conditions you could calculate the amount of error and mostly/invisibly correct for it in a photo editor.
     
  3. Romi

    Romi Well-Known Member

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    Halley, my video does not have this issue and I fly domeless.
    I've been playing with the pics in "Lightroom" which is really where I realized that all the photos were this way. In some of the pics I was able to correct it a bit but not completely. I was hoping to identify what I did wrong to avoid this in future flights.
    When you say anti-vignette are you referring to a controller setting?
     
  4. joeltd

    joeltd Member

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    Romi, you're not alone - mine has the same strange "hot zone" color cast right in the center of most images (it's subtle and not as noticeable in others). Almost as if the saturation and warmth is turned up right in the middle. It's not chromatic aberration or vignetting as far as I'm aware.

    Using Lightroom CC 2015.7, the only lens correction I've got set is the "built in profile" that can't be removed. Downloaded a trial of C1Pro and got the same results. Firmware on the bird is up to date, I shoot in raw, no profiles, never fly with the dome on.. and I've used the new Go 4 app and the old version (iOS), this issue shows up in both. Haven't shot much video yet so can't comment on it showing up there or not.

    Notably, the Mavic I'm flying now is a return/refurb from DJI (I had to send my first one back for the lens misalignment issue on the left, now this one is blurry in the lower right, sigh...) the first one did the same thing as well. It's baffling. If anyone else has this happening or has any pointers, I'm all ears.

    0168-0013-2.jpg
    0168-0013.jpg
    0168-0013-3.jpg
     
  5. Romi

    Romi Well-Known Member

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    Thanks for posting @joeltd . I can say for sure that the 20 minute video I took a week earlier does not have this issue.
    I wonder if shooting "raw" has anything to do with it?
    I've been waiting for the wind to slow down here so I could try some other settings.
     
  6. Romi

    Romi Well-Known Member

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  7. Kilrah

    Kilrah Well-Known Member

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    Yep noticed exactly the same on DNGs processed with lightroom. Not on video, and I didn't shoot RAW+JPEG so can't compare, I'll try to do so next time.

    I've used the adjustment brush with a single click of a huge brush in the middle and a tint adjsutment to make it more uniform, then do a global correction to get it "right".

    It seems to be less of a problem when applying the DJI FC350 profile in LR, but then I don't have any really good samples like yours of the roof to try on.
     
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  8. Tweekme

    Tweekme Member

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    I am seeing this issue only in photos as well on my Mavic Pro. I plan on doing more testing this weekend.


    Sent from my iPhone using Tapatalk
     
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  9. Romi

    Romi Well-Known Member

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    We're you shooting in DNG raw format too?
     
  10. joeltd

    joeltd Member

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    yessir - thanks @Romi, I've used the targeted HSL tool on some, and have also had really good results dropping a radial filter dead center and making a bit of tint/temp adjustments [Radial Filter]. -20 Temp -50 Tint seems to normalize most of mine. Will be sending my bird back to DJI again for the focus issue next week, but may be able to get in a flight tomorrow to shoot some test jpg's.
     
    #10 joeltd, Dec 3, 2016 at 6:15 PM
    Last edited: Dec 3, 2016 at 6:21 PM
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  11. 4wd

    4wd Well-Known Member

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    Yes this works well - and you can save it as "Mavic pink spot" preset or whatever ;)
    I hadn't noticed it in more varied landscape shots but definitely there in RAW (only)
    This suggests the JPG onboard processing removes it using a similar circular filter method.
     
  12. joeltd

    joeltd Member

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    @4wd - Thumbswayup presets FTW. Thanks for the reminder!

    Sharing via dropbox for those that might want a quick preset for LR:

    Mavic Pro Hot Zone Fix.lrtemplate

    Adds a radial filter with [-20 Temp/-50 Tint] in the center, you may need to adjust or tweak to taste
     
    #12 joeltd, Dec 3, 2016 at 6:26 PM
    Last edited: Dec 3, 2016 at 6:40 PM
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  13. Romi

    Romi Well-Known Member

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    I'm a novice and this is what my head was telling me I needed but now I know HOW to do it, THANK YOU!
     
  14. Romi

    Romi Well-Known Member

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    And again thanks, I'll try to figure out presets that sounds like it would make it a lot easier.
     
  15. joeltd

    joeltd Member

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    @Romi you're more than welcome sir, presets are great for saving time.. I guess this pink/hot center issue is just the way the sensor on the Mavic outputs raw data, or the way the Lightroom interprets it. An official lens profile from Adobe could help correct it in the future too. Time will tell.. the journey continues.


    Sent from my iPad using MavicPilots
     
  16. Romi

    Romi Well-Known Member

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    @joeltd I'm currently using the Android Lightroom App and it doesn't offer presets. So I'm now looking into the windows Lightroom 6 since you made me aware of the additional features. Once again, thanks.
     
  17. Romi

    Romi Well-Known Member

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    Thanks @4wd I like the preset idea!
     
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