Flicker removal on still photo time lapse sequence

FCP has a Flicker Filter
Effects>Video Filters>Video>Flicker Filter

I know this light has a terrible flicker and I would like to remove it.

You cannot possibly be seeing the flicker form the lighting source on a still image.

bogiesan

I know this light has a terrible flicker and I would like to remove it.

You cannot possibly be seeing the flicker form the lighting source on a still image.

bogiesan

Yes you would - if some of the photos were taken during the bright milliseconds, others during the dark milliseconds?

It may be easier to use a shutter speed that's longer than the flicker rate, say 1/30th if the flicker is 1/60. Since you're shooting a still life, you could go even slower.

Larry

Is it not simpler to just re-take the photograph if it isn't right?

Hey guys, I'm working with Jon on this project. We are shooting timelapse, as in one photo every 10 seconds. The flicker we see isnt in one photo, it's when we put all the photos together into a sequence and replay them. The problem is that picture a has a much brighter light than picture b and when you play picture a and picture b together sequentially, it creates a flicker. Filters don't seem to work and the problem with sodium lights is they dont have a set flicker frequency. Does anyone have any experience shooting with LED lights or other grow lights that have a set frequency? I think this is our only solution.

Message was edited by: SeanLegnini

AtlanticView wrote:
Yes you would - if some of the photos were taken during the bright milliseconds, others during the dark milliseconds?

Milliseconds? Um, not likely. If so, the photographer is an ignorant lout and should be fired before he does any additional damage. Timelapse photography is not difficult and the topic has a huge, through and easily researched history of classic and modern technique.

bogiesan

SeanLegnini wrote:
Hey guys, I'm working with Jon on this project. We are shooting timelapse, as in one photo every 10 seconds. The flicker we see isnt in one photo, it's when we put all the photos together into a sequence and replay them. The problem is that picture a has a much brighter light than picture b and when you play picture a and picture b together sequentially, it creates a flicker. Filters don't seem to work and the problem with sodium lights is they dont have a set flicker frequency. Does anyone have any experience shooting with LED lights or other grow lights that have a set frequency? I think this is our only solution.

Do you have your camera set on auto?
Sodium vapor lighting strobes near but not exactly at your mains frequency, 50 or 60 Hz. All you have to do is use a shutter speed that spans a good number of impulses so they average, say, 1/2 second. You will not detect a change in exposure over a range of images. One full second would be better as it would capture between 57 and 62 pulses at 60Hz, not quite enough to significantly alter the exposure between frames when going to video's much lower grayscale range. However, what you REALLY want is a strobe that completely overpowers the ambient lighting when the shutter fires at 1/250th second.

Pulling your existing images into Photoshop and running a batch process on them to equalize the exposures is a simple and quick alternative to reshooting.

bogiesan

Hello I am having the same problem. I am shooting a HDR time lapse and when i put it in FCP i too have a flicker. I have shot the time lapse outside, the camera is on manual. the flicker is coming from the clouds passing by and creating a shadow on the ground. so some shots the ground is darker than others.

any hints on removing the flicker?

p.s. i also tried making the HDR effect less dramatic and there is still a flicker.

Hi, after a very hard work I found the way that still images do not flicker nor sparkle in Final Cut.
1.Open the image in Photoshop.
2.Image>Pixel Aspect Ratio>D1/DV NTSC (0.9)
3.Filter>Video>De-Interlace
4.Filter>Blur>Gaussian Blur>Radius 1 pixel
5.Window>Actions>(scroll down to)>Video Actions>"Interlace Flicker Removal" and "Broadcast Safe"
6.Save the image, it will generate a psd file.
7.Use tha file in Final Cut without adding any Final Cut filter like deinterlace, blur and nothing to remove the flickering because it will no flicker !
8.In Final Cut, File>Export>Quick Time Movie>Settings DV NTSC 48 kHz or DV PAL 48 kHz

I hope this will help you, Diego

Message was edited by: diego yabo

Listen to Bogiesan on this. If you going to reshoot set it up so that your grow light goes off and another strobe goes on to light the plant for the camera exposure or just process in psd.

btw, you must need a lot of time lapse or you have a very fast growing plant if you take and image every 10 seconds. Assuming the plant takes 5 weeks to go from seed to partial maturity. And your taking a picture every ten seconds. I believe that comes out to 168 minutes of footage before any speed adjustments.


o| TonyTony |o