Known Participant

Question

How to Reduce Noise or Flicker in Trees

Forum|Forum|9 years ago
February 22, 2017
4 replies
3274 views

Thank you in advance for your help.

Please review this 9 second aerial test footage: Test Aerial Footage - YouTube

Do you notice the noise or flicker in the trees? What is the best way to reduce it?

Thanks much,

Michael

This topic has been closed for replies.

F

felixf10631103

Participant

Did you solve this issue yet? I can't view your video anymore but regarding the title i seem to have quite the same problem. I have made my first steps in shooting videos while traveling a few months ago with a Fuji x-e1 without steadycam. Some of my shots are very shaky and i try to stabilize them with warp stabilizer in premiere CS6. However, after stabilizing there is a lot of flicker especially in the sky and trees, see this example: https://vimeo.com/219284853

The flicker seems to be the strongest everytime my foot stamped on the ground. Is there any way to get rid of this and make the video background smoother?

E

excited_Genie16B8

Legend

Is there any way to get rid of this and make the video background smoother?

Yes. Don't use post stabilization. Use lenses with OIS, or some form of support stabilizer/gimbal.

For the current footage, take it as a lesson learned.

E

excited_Genie16B8

Legend

I think to solve this one, you need a better camera.

A

andyt75574596

Participant

Right click the clip in the timeline and click Field Options > Flicker Removal.

Ann Bens

Community Expert

Flicker Removal slightly blurs two fields together.

I am guessing OP used progressive.

I would add a slight blur as it is not just the trees, its the entire frame.

Michael J TiteraAuthor

Known Participant

Thanks, Ann Bens. Yep, the footage was progressive so, Flicker Removal had no effect.

I will try a slight blur, but I hate the idea of losing detail. I just wish there was an effective tool that would remove this Moire. Thanks again.

gerikp

Community Expert

I'll be interested to see if anyone else has an answer. I think once you get Moire (when small close together details exceed a camera's resolution) it's really hard to get rid of. Best thing to do is avoid capturing it. I believe I've read somewhere that it's suggested when using something like a camera fitted on a DJI quadcopter to reduce in camera sharpening to -2 or -3.

You might start thinking of creative ways to hide the flicker in the trees maybe? I'd start with giving it a tilt-shift effect.

Michael J TiteraAuthor

Known Participant

Thank you, gerikp10383985. The footage was captured using a DJI Phantom 3 4K. The sharpening was left at its default. I will have to try -2 or -3 next time. However, since this was a once-in-a-lifetime shot (wedding), I now need to investigate ways to reduce the Moire. Do you know how I can accomplish the tilt-shift effect in post? Thanks again.

gerikp

Community Expert

I've seen a few tutorials on youtube if you were to search for them I'm sure you could find one that suits your needs. I've had pretty good results by just placing the Gaussian Blur effect on the clip and then using the rectangle mask (inverted) to make my center of interest sharp and then use mask feathering to give the blur some fall off.

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