object_to_color: Apply color to image objects

In pliman: Tools for Plant Image Analysis

Apply color to image objects

Description

The function applies the color informed in the argument color to segmented objects in the image. The segmentation is performed using image indexes. Use image_index() to identify the better candidate index to segment objects.

Usage

object_to_color(
  img,
  pick_palettes = FALSE,
  background = NULL,
  foreground = NULL,
  index = "NB",
  color = "blue",
  plot = TRUE,
  ...
)

Arguments

img	An image object.
pick_palettes	Logical argument indicating wheater the user needs to pick up the color palettes for foreground and background for the image. If TRUE pick_palette() will be called internally so that the user can sample color points representing foreground and background.
foreground, background	A color palette for the foregrond and background, respectively (optional).
index	A character value (or a vector of characters) specifying the target mode for conversion to binary image. See the available indexes with pliman_indexes() and image_index() for more details.
color	The color to apply in the image objects. Defaults to "blue".
plot	Plots the modified image? Defaults to TRUE.
...	Additional arguments passed on to image_binary().

Value

An object of class Image

Examples

if (interactive() && requireNamespace("EBImage")) {
library(pliman)
img <- image_pliman("la_leaves.jpg")
img2 <- object_to_color(img, index = "G-R")
image_combine(img, img2)
}

pliman documentation built on Aug. 21, 2025, 5:46 p.m.