Technical Guide(N-Log 3D LUT Edition)

3
LUTs: A Primer
A “LUT”, or “lookup table”, is an array of preselected values
used in movie color-correction to map colors from the
original input footage to the desired colors in the nal
output. Color correction is performed by looking up input
colors and assigning them new RGB values based on the
data in the table.
A lookup table that treats each of the red, green, and blue
channels separately is a “1D LUT”, which cannot be used to
correct saturation or hue. Such corrections require a “3D
LUT”, in which each combined RGB value maps to a single
combined value in the table.