Convert image to excel

convert.rb

require 'rubygems'
require 'rubyXL'
require 'RMagick'

workbook = RubyXL::Workbook.new
image = Magick::Image.read("Image.jpg").first
image = image.resize_to_fit(100, 100)
#image = image.quantize(256, Magick::GRAYColorspace)
image.rows.times do |row|
  puts "Processing row #{row}"
  image.columns.times do |col|
    colors = [image.pixel_color(col, row).red, image.pixel_color(col, row).green, image.pixel_color(col, row).blue]
    colors.collect! {|color| (color.to_f / Magick::QuantumRange * 255).to_i }

    workbook.worksheets[0].add_cell(row, col, " ")
    workbook.worksheets[0][row][col].change_fill("%02X%02X%02X" % colors)
  end
  
  workbook.worksheets[0].change_row_font_size(row, 0.5)
end

image.columns.times do |col|
  puts "Processing column #{col}"
  workbook.worksheets[0].change_column_width(col, 0.6)
end

workbook.write("Image.xlsx")

Gemfile

source 'http://rubygems.org'

gem 'nokogiri'
gem 'rubyzip'
gem 'rubyXL'
gem 'rmagick'