рисуем картинку текстовыми символами

image_to_text

require 'mini_magick'
require 'chunky_png'

def color_to_s(i)
  dict = [' ', '.','`', ',', '^', '"',':','-','|','/','+','c','a','w','4','A','%','$','#','@']
  dict.reverse!
  curr =dict.length
  curr = (i/(4294967040/(dict.length-1))).floor if i!=0
  dict[curr]
end

#img = MiniMagick::Image.open("C:/minami-ke6.png")
img = MiniMagick::Image.open("C:/3.jpg")
img.resize "256x256"
img.format('png')

p = ChunkyPNG::Image.from_io(StringIO.new(img.to_blob))
p.grayscale!

output = ""

p.height.times do |y|
  p.width.times do |x|
    output+= color_to_s(p[x, y])   if(y%2!=0)
    color_to_s(p[x, y])
  end
  output+= "\n" if(y%2!=0)
end
puts output

File.open('result.txt', "w") do |file|
  file.write(output)
end
img.write("origin.png")