Single RewriteRule convert please

[wickedsunny]

0 down vote favorite
	

hello everyone, i just installed nginx up and running for serving static
content on my site. it works great but the apache rewrite rule about
images (ofcourse) stoped working.

and i don't have an idea how to convert  .

This is what i was using on apache :

RewriteCond %{HTTP_REFERER} !^http://(www\.)?imgzzz.com/.*$ [NC]
RewriteRule i/image_(\d+)\.(jpg|jpeg|gif) pic/$1 [L]

Its purpose is to redirect directly accessed images to the image page
instead. Helps is appreciated

Thanks in advance :) 
cheers

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,155260,155260#msg-155260