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chopmo/gist:2405340

Created April 17, 2012 11:15
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gistfile1.rb
require 'rmagick'
i = Magick::Image.read("test.jpg")[0]
puts i.interlace # => NoInterlace
i.write("test2.jpg") { self.interlace = Magick::PlaneInterlace }
puts i.interlace # => PlaneInterlace
puts Magick::Image.read("test2.jpg")[0].interlace # => JPEGInterlace
i.write("test3.jpg")
puts Magick::Image.read("test3.jpg")[0].interlace # => NoInterlace
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