rgb_to_greyscale: Convert RGB to greyscale

In starsExtra: Miscellaneous Functions for Working with 'stars' Rasters

Convert RGB to greyscale

Description

Convert a 3-band RGB raster to 1-band greyscale raster. Based on wvtool::rgb2gray.

Usage

rgb_to_greyscale(x, rgb = 1:3, coefs = c(0.3, 0.59, 0.11))

Arguments

x	A three-dimensional stars object with RGB values
rgb	Indices of RGB bands, default is c(1, 2, 3)
coefs	RGB weights, default is c(0.30,0.59,0.11)

Value

A two-dimensional stars object greyscale values

Examples

data(landsat)
plot(landsat, rgb = 1:3)
landsat_grey = rgb_to_greyscale(landsat)
plot(landsat_grey, breaks = "equal")

starsExtra documentation built on May 29, 2024, 12:05 p.m.