lab_to_rgb {schemr}

Convert from Lab space into RGB colour channels.

Description

Convert from Lab space into RGB colour channels.

Usage

lab_to_rgb(lab, transformation = "sRGB", linear_func = NULL)

Arguments

lab

A dataframe or matrix with L, a and b colour channels located in the columns 1 to 3, respectively.

transformation

An option in c("sRGB", "Adobe") for a built-in transformation or, alternatively, a custom 3x3 transformation matrix.

linear_func

A function to convert RGB colour space into non-linear RGB space. Used only if a custom transformation matrix is provided. Transformation skips if no function is provided under a user-defined transformation matrix. See: https://en.wikipedia.org/wiki/SRGB.

Value

A tibble of red, green and blue colour channels.

Examples

red <- sample(x = 1:255, size = 10, replace = TRUE)
green <- sample(x = 1:255, size = 10, replace = TRUE)
blue <- sample(x = 1:255, size = 10, replace = TRUE)
lab_to_rgb(rgb_to_lab(data.frame(r = red, g = green, b = blue)))