In order to show a grayscale characteristic and color reproduction that is visually correct, the logВ material needs to be tone-mapped for the right encoding and transformed into the target color space. These LUTs simply tone map log images into aВ viewable color space such as Rec.709. This is because a)В the logarithmic scene encoding is different from the display specific image encoding and b)В the colors cannot be reproduced by the gamut of the display.Д®nter log normalisation LUTs. When viewed on an HDTV or computer screen for example, log images tend to look washed out. The overall shape of the logВ curve is similar to the exposure curves of film negatives.Д«ecause of fundamental differences between a sensor and negative film, however, the color characteristics remain different. This is done in order preserve as wide dynamic range as possible in the recorded image.

Each stop of exposure increases the signal by the same amount. Log encodingВ is a logarithmic encoding of the scene, meaning that the relation between exposure measured in stops and the signal is constant over a wide range. These LUTs are used to normalise or tone map log images or footage into a standard color space such as Rec.709. What types of LUTs are there? Log normalisation LUTs 3D LUTs are much more useful for capturing and relaying complex color grades than a 1D LUTs. 3D LUTs вЂ“ These LUTs overcome the limitations of 1D LUTs by placing color and luma in a 3D space, a much more representative way of how color works in real world.1D LUTs вЂ“ These LUTs may be useful for setting contrast, the white point of a display, or overall color balance adjustments but they do little to convey the complexities needed for creating a good looking image when grading.There are two types of LUTs we can use in the color grading process. In practical and simplified terms, a LUT is a look which you can apply to your image or footage in order to correct it or give it a distinctive, creative, starting point for your final color grade. LUT in this case represents the difference needed to make up between the result and the source material. It is useful to think of LUTs using the following equation:

However, LUTs may be used as a starting point for color grading. LUTs are commonly used to calculate preview colors for a monitor or digital projector of how an image will be reproduced on another display device. For example, a LUT can remap a log image into Rec.709 space or it can be used to apply a preset look for any given image or footage. In short, LUT is a table used to map one color space to another. Recently though theyвЂ™re starting to be embraced by individualВ filmmakers and photographers. TheyвЂ™ve been part of the filming industry for years and colorists and DITs have been using them successfully in their workflows for ages. Color grading can be all the difference between a dull and visually interesting shot.ДЈD LUTs are nothing new. When youвЂ™re using 3D LUTs as a part of yourВ color grading process, it is even of higher importance to followВ these simple rules.

It is extremely important to follow a few simple rules when it comes to color grading in order to make sure itВ enhances your footage. However, color grading can also ruin a beautiful footage if done improperly and destroy all the hard work put into filming it. It can really enhance the viewing experience. It can help convey the story and set the atmosphere for the whole film.В When properly done, color grade can take average footage or image and transform it into visually interesting one. Smart color grade can make the difference between visually interesting shot and a dull one. Color grading is an extremely important part of filmmaking and photography process.

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