im_distribute: Shift and scale the distribution of pixel values

In tsuda16k/pictplot: Image processing functions

Shift and scale the distribution of pixel values

Description

Shift and scale the distribution of pixel values

Usage

im_distribute(
  im,
  channel,
  mean = NULL,
  sd = NULL,
  space = "CIELAB",
  clamp = TRUE
)

Arguments

im	an image
channel	color channel
mean	center of distribution. when not given, the mean of that channel is used.
sd	dispersion of distribution. when not given, the sd of that channel is used.
space	color space
clamp	either TRUE (default, output pixel value is clamped to range 0-1) or FALSE

Value

an image

Examples

im_moments(regatta) # before manipulation
im_moments(im_distribute(regatta, "b", mean = 0, sd = 20)) # b channel is adjusted
plot(im_distribute(regatta, "b", mean = 0, sd = 20)) # see the effect
plot(im_distribute(regatta, c("a", "b"), c(-5, 0), c(15, 20))) # adjust two channels simultaneously

tsuda16k/pictplot documentation built on March 1, 2023, 8:44 p.m.