Script for resizing a directory of images using Ruby. Note requires the RMagick gem to be installed and assumes Rbenv is used for managing the Ruby Version. Blog post: http://www.calebwoods.com/2015/02/01/batch-resizing-images-ruby/
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#!/usr/bin/ruby | |
require 'RMagick' | |
require 'pathname' | |
@directory = Pathname(File.expand_path(ARGV[0])) | |
@size = ARGV.fetch(1) { 1025 } | |
def resize_image(file) | |
img = Magick::Image.read(file).first | |
resized = img.resize_to_fit(@size) | |
resized_path = @directory.join('resized', File.basename(file)) | |
resized.write(resized_path) do | |
self.quality = 100 | |
end | |
# free up RAM | |
img.destroy! | |
resized.destroy! | |
end | |
resize_dir = "#{@directory}/resized" | |
unless File.directory? resize_dir | |
puts "Creating #{resize_dir}/" | |
Dir.mkdir resize_dir | |
end | |
files = Dir.glob "#{@directory}/*.{jpg,png,gif}" | |
puts "Resizing #{files.size} images..." | |
files.each do |file| | |
puts "Resizing #{file}" | |
resize_image(file) | |
end | |
puts "Finished resizing #{files.size} images" |
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