It looks like you only have a single images directory. Is that true? If so, you can dispense with File::Find::Rule altogether. Just look in the directory yourself, something like this:

opendir D, $imagedir or die "Can't open $imagedir: $!\n";
@files = grep($files, readdir D);
closedir D;
# Rest of your code here
[download]

The main strength of File::Find and friends is that they can recurse through an entire directory structure. If you don't need that functionality, stick with something simpler/easier to debug.