Preventing mass-download of photos

[agoia]

Because I've worked alot to collect several hundreds images on the same subject, I don't want someone to mass-download them.

All images are stored in a single directory, /htdocs_root/images/. Apache server is running under Linux.

How this can be done?

[bakedjake]

Deny access based upon referrer (or lack thereof), and also perhaps limit number of requests per IP in a certain tine period (say daily).