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Contents
#! /usr/local/bin/ruby -w
require 'RMagick'
# Demonstrate the Image#negate_channel method
img = Magick::Image.read('images/Flower_Hat.jpg').first
result = img.negate_channel(false, Magick::GreenChannel)
result.write('negate_channel.jpg')
exit
Version data entries
29 entries across 29 versions & 2 rubygems