channels: Extract channels from RGB data
In RNifti: Fast R and C++ Access to NIfTI Images

channels

R Documentation

Extract channels from RGB data

Description

Extract one or more channels from an RGB data array that was obtained from an RGB NIfTI image or created by the rgbArray function. The result is more amenable to numeric manipulation.

Usage

channels(array, channels = c("red", "green", "blue", "alpha"), raw = FALSE)

Arguments

`array`	An image, an `rgbArray`, or another array that can be converted to the latter.
`channels`	A character vector of channels to extract.
`raw`	Boolean value: if `TRUE`, return a raw array, which is the most compact representation; otherwise return an integer array.