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Nov 15, 2020 · What is a LUT? LUT (known as Lookup Table) is a term used to describe a predetermined array of numbers that provide a shortcut for a specific computation. In the context of color grading, a LUT transforms color input values (camera) to your desired output values (final footage).
- What Is A LUT?
- Where Do Luts Come from?
- Luts vs. Looks
- Drawbacks to Luts
- 1D vs. 3D Luts
- When You Should Use Luts
- When You Shouldn't Use Luts
- Manipulating Luts
- What Is Replacing Luts?
- Adobe Premiere
To start with, let's supply a simple LUT definition: a LUT is just a "lookup table." That's it. It's a table of values. In fact, if you have a LUT of some sort (you can download them many places on the internet), you can open that LUT in TextEdit or Notepad and read it. That's it. Just plain text readable numbers in a specific order. Every LUT form...
While you can download LUTs from creative websites and also directly from manufacturers, you can always make LUTs yourselves. In grading applications like DaVinci Resolve, you can color grade footage, then, when you like the grade, export the LUT to a new LUT file that you then pass on to wherever it is needed. Be sure to research the precise forma...
Some might hear this and think, "Oh, a LUT is just a look!" And in some ways, a LUT and a "look" are somewhat similar. However, a look usually has more elements in it. For instance, if you go into the camera menus on most cameras, there is often a "sharpness" setting, and "sharpness" or "softness" is usually a big part of creating a "look" for a pr...
While LUTs are very powerful considering their small file size, they do have a few drawbacks to be aware of. First and foremost, it's that a LUT affects your whole image the same way. You can't apply any shape information on a LUT, so you can't do a subtle vignette to point the eye or do anything else with shapes. A LUT affects every pixel in the f...
You'll see a lot about 1D and 3D LUTs, and once you know the difference, it's easy to remember. A 1D LUT only covers one direction, brightness. So you'll often see 1D LUTs used for converting log to linear footage, since that is a transformation of brightness. A 3D LUT covers 3 dimensions, which are the red, green, and blue channels of color video....
Because of these drawbacks, LUTs make the most sense during production and the early stages of post. If you are working on a shoot and know what kind of look you want to put on the footage, using a LUT on set can help your collaborators see your vision and help make key decisions easier. If you know you are going for a lot of contrast, for instance...
LUTs are best avoided as part of the final creative color grading process. When you get into your grading session, you might bring along your LUTs to show them to the colorist to help give them perspective on the looks you were using while shooting and editing, but it's better for the colorist to recreate that look from scratch in their editing pla...
There is a wonderful piece of software called Lattice for when you find you need to manipulate a LUT. For instance, let's say you have a calibration LUT for a monitor, but the director always wants a "look"-type LUT on there as well, but the monitor you are using only supports one LUT. You can use Lattice to combine two LUTs into a single LUT for u...
While LUTs are wonderful and are likely here to stay on set, they are slowly being moved out of post. The replacement is what is called a transform. Unlike a LUT, which is a set table, a transform is a math equation. So instead of a given brightness value having a place in the table, and the software looks at the table and changes it, with a transf...
One of the things that makes this a little bit more confusing is how LUTs are integrated in Adobe Premiere with the Lumetri color panel. Adobe has a whole array of prebuilt looks with a variety of cool-sounding names like Big Minus Blue and Bleach HDR. To add looks to that list, you can select custom and add a LUT file, which leaves many users thin...
Sep 18, 2024 · 3. Load the LUT. Look for the option to apply a LUT within the color grading or effects panel of your software. This option might be labeled as Apply LUT, Look, or Custom LUT. In Adobe Premiere Pro: Go to the Lumetri Color panel, then under Basic Correction or Creative, select the Input LUT dropdown and choose Browse to locate the LUT file.
Aug 12, 2019 · A LUT, or lookup table, is a list of numerical values used to transform an image’s contrast and/or color. That’s it. A set of values is sampled from the incoming image, and these values are modified according to the numbers stored in the table. This results in a change in contrast, color, or both. Image pre-LUT.
Jul 14, 2023 · The crucial understanding is that a LUT is akin to a filter on a camera's lens. It has no understanding of what the image is; it simply modifies colours. If, for instance, we colour-balance a camera to daylight and then add an orange filter to shoot under tungsten light, the image should look correct. If the camera was already balanced to shoot ...
Apr 4, 2020 · In the field of color grading, a LUT is used to convert an input color value into a different output color value. In most basic terms is a smart video presets, that you apply on your footage. This video presets help your color grade and transform the look and feel of your video in no time. LUTs can be applied to your footage or stills via your ...
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Jun 16, 2022 · Conversion LUT. The other way LUTs are used is to convert flat, desaturated footage back into a typical color space. This is called a “conversion LUT.”. Many cameras can shoot in flat color profiles, often called LOG. These color profiles look pretty bland as raw footage, but what’s happening behind the scenes is magical.
