Is there a simple way to get image dimensions in Ruby?

ruby image osx-snow-leopard dimensions
gruner picture gruner · Mar 15, 2010 · Viewed 25.1k times · Source

I'm looking for an easy way to get width and height dimensions for image files in Ruby without having to use ImageMagick or ImageScience (running Snow Leapard).

Answer

Alan W. Smith picture Alan W. Smith · Jun 22, 2012

As of June 2012, FastImage which "finds the size or type of an image given its uri by fetching as little as needed" is a good option. It works with local images and those on remote servers.

An IRB example from the readme:

require 'fastimage'

FastImage.size("http://stephensykes.com/images/ss.com_x.gif")
=> [266, 56]  # width, height

Standard array assignment in a script:

require 'fastimage'

size_array = FastImage.size("http://stephensykes.com/images/ss.com_x.gif")

puts "Width: #{size_array[0]}"
puts "Height: #{size_array[1]}"

Or, using multiple assignment in a script:

require 'fastimage'

width, height = FastImage.size("http://stephensykes.com/images/ss.com_x.gif")

puts "Width: #{width}"
puts "Height: #{height}"

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