PhotoRename Description:

Photo rename utility. Manage your digital image files using informative filenames:

Most digital cameras produce image files named something like DSC_3179.jpg.
For most practical purposes, such filenames are meaningless and completely
useless.

PhotoRename can rename all your image files (and other files, too) to
something more meaningful. You can automatically extract and format
EXIF date and time (found in practically all files produced by modern
digital cameras), image pixel size, etc.

Using PhotoRename you can easily rename thousands of files from
DSC_xxx.jpg to something human-readable like:

"Trip to Venice June_21_2002 @ 10-58-11.jpg"

or

"2002_May_17 time_11-17 (1600x1200 pixels).jpg"