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Contents
#! /usr/local/bin/ruby -w
# Demonstrate the map, append, and composite methods by
# mapping the colors in three separate images into the
# 216 "Web-safe" colors.
require 'RMagick'
# Read three images.
unmapped = Magick::ImageList.new("images/Hot_Air_Balloons.jpg","images/Violin.jpg","images/Polynesia.jpg")
# "Read" the Netscape 216-color cube
map = Magick::ImageList.new "netscape:"
# Map the group of unmapped into the Netscape colors
$stdout.sync = true
printf "Mapping... Please be patient, this may take a few seconds... "
mapped = unmapped.map map, false
puts "Done."
# Use the append method to arrange the unmapped images
# side-by-side into a single image. Repeat for the mapped images.
before = unmapped.append false
before.write 'map_before.jpg'
after = mapped.append false
after.write 'map_after.jpg'
exit
Version data entries
47 entries across 47 versions & 1 rubygems