Reorder colors in a recolorize object — reorder

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?

Value

A recolorize object.

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.

Examples

img <- system.file("extdata/corbetti.png", package = "recolorize")
rc <- recolorize2(img, cutoff = 45)
#> 
#> Using 2^3 = 8 total bins


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)