They vary from specific LUTs created by filmmakers to LUTs created by camera manufacturers to work with specific cameras or series of cameras. The reasons behind using LUTs include the fact that they are readily available online and are often free. As mentioned above, you can even load a LUT into a monitor or display to calibrate it to get an idea of what the finished look of your film might be. They can also make log or flat footage come to life by adding contrast and style or by converting it back into a Rec.709 colour space. LUTs are most commonly used for creating and saving colour grades, which can be used or applied to other film projects. Why should you use LUTs in video editing? Hopefully, you’ll now have a better idea of the key different types of LUTs available, but what are they used for? A 3D LUT is created with a number of input and output points (usually 17, but sometimes more) and any value outside of those points is interpolated. They are based on a three dimensional cube which maps all of the colours together and gives you greater adjustment potential. A 3D LUT – as the name suggests 3D LUTs are more complex than 1D LUTs.Each colour is treated separately so, for example, a change in blue wouldn’t affect a red value. A 1D LUT – a 1D LUT modifies an image, but it has fairly limited adjustment possibilities as it is composed of just three different data mappings – one for red, one for green and one for blue.For films a viewing LUT is often created for the Director of Photography to look at and then these are regularly shared with post-production editors as a starting point for final grading. Viewing LUTs can range from converting a flat S-Log or Log C into a normal looking Rec.709 images to more aesthetic choices. A viewing LUT – this type of LUT is designed to make a camera’s output look good during shooting.For example, the transformation could be from Rec.709 to DCI-P3 (a cinema colour space). A transformation LUT – this type of LUT converts an image from one colour space to another.In essence, it’s a correction/display matching LUT rather than a creative LUT. A calibration LUT may also be described as a display or monitor LUT. A calibration LUT – this is a LUT that will help you to correct and calibrate any inaccuracies in your displays and ensure that a reference monitor, or projector, adheres to a standard colour space (such as Rec.709).The different types of LUTs in video editing include calibration LUTs, transformation LUTs, viewing LUTs, 1D LUTs and 3D LUTs. They can be applied directly to your footage, can help to speed up the grading process and can transform your footage to look like your favourite films or TV shows. Some LUTs change saturation, some increase contrast and some can change the input colours completely. What are the different types of LUTs in video editing?Ĭolour LUTs just take in colour values and output the corresponding colours. You should also be aware of the colour space and input level intended for any LUT and the type of shot it was intended for. So, LUTs are not simply a ‘quick fix’ method to achieve great looking colour grades – you must be aware of doing your colour correction parameters properly before applying any LUT. However, it’s vital to remember that if your footage doesn’t match from shot to shot, isn’t correctly exposed or isn’t colour corrected properly then a LUT won’t work in the way you might want it to. Arguably LUTs are the quickest way to grade your footage once it has been colour corrected. In previous posts I discussed colour correction and colour grading and LUTs, if used, are a different option in the grading process. You can think of LUTs as preset colour looks for your video footage that can help to speed up your editing process. In other words, a LUT is a conduit/code to transform colour (RGB) input values from your camera to different colour (RGB) output values to give your final footage a different look or feel. The abbreviation LUT is an acronym that stands for ‘LookUp Table’, but what, exactly is a LUT? Put simply, a LUT holds a set of defined data in numbers (a mathematical formula), which are ‘looked up’ by the software you’re using to change the input values of colours, saturation, brightness and contrast in the footage from your camera. A computer with enough memory to handle 4K video edits.A high-quality hard drive to back up your work.To delve deeper, let’s take a closer look at LUTs to examine exactly what they are, why you should consider using them and how to apply LookUp Tables to your video edits. LookUp Tables (aka LUTs) are additional tools that expand your capabilities when creating and saving colour grading of your footage.
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