Meanwhile, 3D LUTs affect a wider range of characteristics including hue, saturation, and luminance (or brightness) in a three-dimensional space. Simply, 1D LUTs control limited parameters including white point, color balance, and contrast. In addition to the above list of LUTs, you may hear the terms 1D LUTs and 3D LUTs. When color grading, they can be dropped right onto footage - similar to a filter on a social media app - to creatively change the look in different ways. They are used to create a look, feel, or aesthetic to an image. Creative LUTĬreative LUTs are the most recognizable (and the most fun) on the list. 709, so the crew can more properly adjust their on-set image. So a viewing LUT will convert those log color profiles to a more standard space, such as Rec. However, it appears flat and unsaturated out of the camera. As mentioned, shooting in log profiles retains more information from the image to use in post-production. Viewing LUTs are used on production sets so the crew can accurately view live shots on the monitors. Common log profiles include Sony’s sLog, Canon’s cLog, Red’s REDLogFilm, ARRI’s Log C, and Blackmagic’s Log. However, the footage appears extra flat out of the camera. Log color profiles capture footage in high dynamic range, so it lends to a more flexible color correction process. Speed LUTĪlso referred to as log normalization LUTS, speed LUTs quickly convert footage from a cinema camera’s log color profiles to more standard color spaces such as Rec. For example, if the intended viewing space is sRGB, the colorist wants their grading suite to be calibrated to that color space. That way, when colorists correct, grade, and then deliver the finished product, it is accurate and consistent with the intended viewing space. As the name suggests, they are used to calibrate or profile monitors for the correct colorspace. Calibration LUTĬalibration LUTs fall under the umbrella of technical LUTs, but are sometimes referenced separately. You may also hear this referred to as a transformation LUT. 709 footage – the standard color space for high-definition video – to DCI XYZ, which is the colorspace used for digital cinema projection. Colorists or finishers may use a technical LUT to convert Rec. Sometimes, the terminology for the different types of LUTs can change, but here is a basic breakdown of the different LUTs and their uses: Technical LUTĪ commonly used LUT in post-production, the technical LUT transfers footage from one color space to another. There’s a variety of LUTs that all achieve a different goal. 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. 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.
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