Apply exposure compensation (in stops) — render_exposure • rayimage

Apply exposure compensation (in stops)

render_exposure(image, exposure = 0, filename = NA, preview = FALSE, ...)

Arguments

image: 3-layer RGB/4-layer RGBA array, rayimg class, or filename of an image.
exposure: Default 0. Exposure compensation in stops; RGB is scaled by 2^exposure.
filename: Default NA. Output path.
preview: Default FALSE. If TRUE, display the image.
...: Additional args passed to plot_image() (when preview=TRUE) or to ray_write_image() (when filename is given).

Value

A rayimg RGBA array.

Examples

# LDR/sRGB (auto): decodes to linear, applies EV, re-encodes
if (run_documentation()) {
  render_exposure(dragon, exposure = +1, preview = TRUE)
}

# Force linear/HDR behavior
if (run_documentation()) {
  render_exposure(dragon * 2, exposure = -1, preview = TRUE)
}