command line - Batch rename files in linux using folder name

I have a load of directories (2005 - 2012), each with files (01.jpg - 100.jpg).

If I wanted to rename all the files into the base directory, renamed to, for example, Folder 2005 - 01.jpg, what would be the easiest way of doing this by the command line in Linux?

For example from

/home/mark/images/2005/01.jpg
/home/mark/images/2005/02.jpg
/home/mark/images/2005/03.jpg
/home/mark/images/2006/01.jpg
/home/mark/images/2006/02.jpg
/home/mark/images/2006/03.jpg

to

/home/mark/images/Folder 2005 - 01.jpg
/home/mark/images/Folder 2005 - 02.jpg
/home/mark/images/Folder 2005 - 03.jpg
/home/mark/images/Folder 2006 - 01.jpg
/home/mark/images/Folder 2006 - 02.jpg
/home/mark/images/Folder 2006 - 03.jpg

Surely there must be a simple one liner for this? I know that you can use, e.g. {2005-2012} to access the multiple directories, but I'm not sure how to then access that value later when renaming.

Answer

#!/bin/bash
for year in 20??; do
  pushd "$year"
  for file in *; do
    echo mv "$file" ../"Folder ${year} - ${file}"
  done

  popd
done

Remove the echo if the output looks good to you.