plotColorClusters: Plot color clusters in a color space

In recolorize: Color-Based Image Segmentation

Plot color clusters in a color space

Description

Plots color clusters in a 3D color space.

Usage

plotColorClusters(
  centers,
  sizes,
  scaling = 10,
  plus = 0,
  color_space = "sRGB",
  phi = 35,
  theta = 60,
  alpha = 0.5,
  ...
)

Arguments

centers	A matrix of color centers, with rows for centers and columns as channels. These are interpreted as coordinates.
sizes	A vector of color sizes. Can be relative or absolute; it's going to be scaled for plotting.
scaling	Factor for scaling the cluster sizes. If your clusters are way too big or small on the plot, tinker with this.
plus	Value to add to each scaled cluster size; can be helpful for seeing small or empty bins when they are swamped by larger clusters.
color_space	The color space of the centers. Important for setting the axis ranges and for converting the colors into hex codes for plotting. The function assumes that the centers argument is already in this color space.
phi, theta	Viewing angles (in degrees).
alpha	Transparency (0-1 range).
...	Further parameters passed to plot3D::scatter3D.

Details

This function does very little on your behalf (e.g. labeling the axes, setting the axis ranges, trying to find nice scaling parameters, etc). You can pass those parameters using the ... function to plot3D::scatter3D, which is probably a good idea.

Value

Nothing; plots a 3D scatterplot of color clusters, with corresponding colors and sizes.

Examples

corbetti <- system.file("extdata/corbetti.png", package = "recolorize")
init_fit <- recolorize(corbetti,
                       color_space = "Lab",
                       method = "k",
                       n = 30)

# we still have to convert to Lab color space first, since the centers are always RGB:
centers <- grDevices::convertColor(init_fit$centers, "sRGB", "Lab")
plotColorClusters(centers, init_fit$sizes,
                  scaling = 25,
                  color_space = "Lab",
                  xlab = "Luminance",
                  ylab = "a (red-green)",
                  zlab = "b (blue-yellow)",
                  cex.lab = 0.5)

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