class Magick::Image::View::Rows

def [](*args)
  cols(args)
  # Both View::Pixels and Magick::Pixel implement Observable
  if @unique
    pixels = @view[@rows[0] * @width + @cols[0]]
    pixels.add_observer(self)
  else
    pixels = View::Pixels.new
    each do |x|
      p = @view[x]
      p.add_observer(self)
      pixels << p
    end
  end
  pixels
end