Thanks Jason. Do you know of any way that DPI / PPI can be obtained?
The problem I'm having is that I need to know the DPI so that I can calculate a print of an uploaded image. Not knowing the DPI makes the width and height useless since a 1000 x 1000 72dpi image is very different than a 1000 x 1000 150dpi (or 300dpi) image.