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

For PNGs I got this modified version of ChristopeD's method to work.

File.binread(path, 64)[0x10..0x18].unpack('NN')