More practically, LUTs act as filters that can be dropped onto images to get a desired outcome.
Technically, a LUT is nothing more than a large set of numbers that remap an image’s values to change the look of the image. Everyone from the director of photography to the video editor and the colorist rely on LUTs. A LUT can be used in a variety of ways including adding an aesthetic look to an image, converting footage from one color space to another, or even to calibrate monitors on set. Frustrating.Look-up Tables, or LUTs, are a tool to use during the pre-production, production, and post-production process, although it is most commonly associated with post production. There's a plugin that can help with this by RE:Vision Effects. And like this, they flicker in/out on a regular basis due to the nature of the electrical current (frequency) and the nature of the bulb. Having a flicker of one direction with an LED bulb, while a supposedly clean daylight flourescent gives a different color. I've seen this sort of thing with a number of different "modern" lights. What I think this may well be is the light source of the image itself. And thanks for including the scopes, you can see it in the upper left waveform quite clearly. I had to check your scopes for that flicker, as I couldn't see it in the image. NO OTHER app does the process the way their Basic tab does, with the LUT applied first. I've argued this for year with their chief color scientist. Then use the Basic tab controls to trim or fit the clip into the LUT. In Premiere, that means using the Creative tab dropdown for any normalization/transform LUTs. To get your clip to fit what the LUT expects to see. So any transform LUT should be applied with the capability to trim the exposure, black/white points, contrast, and saturation prior to the LUT. and as long as you feed the LUT a clip with the exact same exposure/contrast/lighting color, it's cool. So LUTs are built under a specific lighting color/intensity-exposure/contrast. this pixel on input changes to that pixel on output. colorists call LUTs "the dumbest math out there". I've also attached a video of the weird green and pink flickering happening.Īnyone have any ideas for these two issues? I am very new to color grading shooting in log, so fully accept the possibility that there is user error happening here.įirst bit of advice about grading log.
I've attached before and after screenshots of a clip with and without the LUT applied, at 100% intensity. 709 LUT, I've tried reducing the intensity of the LUT, but nothing really makes a strong difference. The second thing is I’ve noticed a lot of what I think is banding? More noticeable on some clips than others, but essentially it’ll go from green to pink and there will be a TON of noise revealed. All the reds look pretty pink, and people look extra pink. First thing I noticed is that the footage has a lot of pink happening. In color correction, I am applying a clog3 to rec709 LUT. I'm currently trying to color correct and color grade.
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