EXIF data script

Happy Monday! The cold front broke yesterday, and now all of Great Falls is basking in the balmy 40ºF. Too bad. I love every part of the "bitter" cold, except the heat bill.

Anyway, I spent much of yesterday arm deep in my *nix box (Mandrake 10.1), trying to write a regular expression that would help organize my image directory. I just rebuilt the machine, and when I tranferred over my files, the file date/time was adjusted to system date/time of the transfer.

Anyway, I want write a script that will parse out the EXIF image creation date/time for every file in my image directory (including the entire subdirectory structure), and change the file date to the EXIF date. I would also like the file name prepended with the YYYY_MM_DD-hh_mm in those EXIF headers. The script should look at every file in the directory and only adjust those with a valid EXIF header. Because of the different programs/devices used to capture images, it should be able to find images with non-standard file extensions (i.e., *.JPG; *.jpg; *.jpeg; etc.)

I played around with jhead, to no avail so far. Any ideas?