reorder_colors: Reorder colors in a recolorize object

In recolorize: Color-Based Image Segmentation

Reorder colors in a recolorize object

Description

Often for batch processing purposes, it is important to ensure that color centers fit using different methods are in the same order.

Usage

reorder_colors(recolorize_obj, col_order, plotting = FALSE)

Arguments

recolorize_obj	An object of class recolorize.
col_order	A numeric vector of the length of the number of color centers in the recolorize object specifying the order of the colors.
plotting	Logical. Plot the results?

Details

While you can manually specify the col_order vector, one way to automatically order the colors according to an external color palette (as might be needed for batch processing) is to use the match_colors function, although it is recommended to double-check the results.

Value

A recolorize object.

Examples

img <- system.file("extdata/corbetti.png", package = "recolorize")
rc <- recolorize2(img, cutoff = 45)
ref_palette <- c("mediumblue", "olivedrab", "tomato2", "beige", "grey10")
col_order <- match_colors(ref_palette, rc$centers, plotting = TRUE)
rc2 <- reorder_colors(rc, col_order, plotting = FALSE)

# the colors are reordered, but not changed to match the reference palette:
plot(rc2)

# you can also change them to the reference palette:
rc2$centers <- t(grDevices::col2rgb(ref_palette) / 255)
plot(rc2)

recolorize documentation built on April 4, 2025, 3:07 a.m.