image_pal: Image palette

In RImagePalette: Extract the Colors from Images

Description

Image palette function

Usage

image_pal(image, choice = mean, volume = FALSE)

Arguments

image	Matrix The image from which the palette will be extracted from. Should be a 3 (or more) dimensional matrix. The output of a function such as readJPG() or readPNG() are suitable as image.
choice	Function Defines how the color will be chosen from the final color cubes. The default choice is to take the mean value of the image cube, but other choices may return a subjectively superior scale. Try median, or min, or max, or whatever summary statistic suits your fancy.
volume	Logical volume controls the method for choosing which color cube to split at each iteration of the algorithm. The default choice (when volume = FALSE) is to choose the cube based on which cube contains the largest extent (that is, the largest range of some color). When volume = TRUE, the cube with the largest volume is chosen to split. Occasionally, setting to TRUE returns a better palette.

Examples

img <- jpeg::readJPEG(system.file("img", "Rlogo.jpg", package="jpeg"))
display_image(img)
scales::show_col(image_pal(img)(10))

RImagePalette documentation built on May 2, 2019, 9:19 a.m.