#!/usr/bin/ruby -w require 'RMagick' # Demonstrate Image#shade ballerina = Magick::Image.read('images/Ballerina.jpg').first ballerina.crop!(0,116,416,468) ballerina.resize!(250.0/ballerina.rows) ballerina = ballerina.shade(true) #ballerina.display ballerina.write('shade.jpg') exit