rayimage (version 0.26.1)

render_bw: Render Black and White

Description

Transforms an image to black and white, preserving luminance.

Usage

render_bw(
  image,
  rgb_coef = c(0.2126, 0.7152, 0.0722),
  filename = NULL,
  preview = FALSE
)

Value

A rayimg RGBA array.

Arguments

image

3-layer RGB/4-layer RGBA array, rayimg class, or filename of an image.

rgb_coef

Default c(0.2126, 0.7152, 0.0722). Length-3 numeric vector listing coefficients to convert RGB to luminance.

filename

Default NULL. The filename of the image to be saved. If this is not given, the image will be plotted instead.

preview

Default FALSE. Whether to plot the convolved image, or just to return the values.

Examples

if (FALSE) { # interactive() || identical(Sys.getenv("IN_PKGDOWN"), "true")
#Plot the image with a title
dragon |>
 render_title("Dragon", title_offset=c(10,10), title_bar_color="black",
           title_size=20, title_color = "white") |>
 render_bw(preview = TRUE)
}