Pixelizing images with ChunkyPNG - codebrawl #2

output.png

pixelit.rb

require 'rubygems'
require 'chunky_png'

module Pixelization

  def pixelizing_replace!(size)
    # This method uses the (0,0) color value for the (size,size) grid
    # as the value throughout the pixelization

    (0..self.height-1).step(size) do |h|

      row = self.row(h)
      indices = (0..width-size).step(size).to_a

      indices.each do |i|
        row[i,size] = size.times.map { row[i] }
      end

      size.times do |h_delta|
        if (h + h_delta) < self.height
          self.replace_row!(h + h_delta, row)
        end
      end

    end
  end

end


image = ChunkyPNG::Image.from_file('input.png')
image.extend Pixelization
image.pixelizing_replace!(10)
image.save("output.png")