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

Question

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 1

There's a handy method in the paperclip gem:

>> Paperclip::Geometry.from_file("/path/to/image.jpg")
=> 180x180

This only works if identify is installed. If it isn't, if PHP is installed, you could do something like this:

system(%{php -r '$w = getimagesize("#{path}"); echo("${w[0]}x${w[1]}");'})
# eg returns "200x100" (width x height)