imHeatmap {recolorize}

Plot a heatmap of a matrix of color distances

Description

Plots the output of imDist as a heatmap.

Usage

imHeatmap(
  mat,
  palette = "default",
  main = "",
  range = NULL,
  legend = TRUE,
  ...
)

Arguments

mat

A color distance matrix, preferably output of imDist.

palette

The color palette to be used. Default is blue to red (colorRamps::blue2red(100)).

main

Plot title.

range

Range for heatmap values. Defaults to the range of values in the matrix, but should be set to the same range for all images if comparing heatmaps.

legend

Logical. Add a continuous color legend?

...

Parameters passed to image.

Value

Nothing; plots a heatmap of the color residuals.

Examples

chongi <- system.file("extdata/chongi.png", package = "recolorize")
chongi <- png::readPNG(chongi)
chongi_k <- recolorize(chongi, "k", n = 5)

recolored_chongi <- constructImage(chongi_k$pixel_assignments,
                                   chongi_k$centers)
d <- imDist(chongi,
            recolored_chongi, plotting = FALSE)

# original flavor
imHeatmap(d)

# bit offputting
imHeatmap(d, palette = colorRamps::ygobb(100))

# just dreadful
imHeatmap(d, palette = colorRamps::primary.colors(100))