Perform simple desaturation or grayscale conversion of RGBA colors.

Perform simple desaturation or grayscale conversion of RGBA colors.

Usage

desaturate(color, gamma_correct = FALSE)

Arguments

color

rgba color strings

gamma_correct

logical, whether to apply non-linear gamma correction. First performs gamma expansion, then applies the gray-scale channel weights, then gamma compression.

Value

rgba color strings, the gray-scale colors. The information from one of the three RGB channels would be enough. The alpha value is not touched.

Note

Assumes sRGB color space.

References

see https://en.wikipedia.org/wiki/Grayscale#Converting_color_to_grayscale

See also

Other color functions: alphablend()