I'm not sure since when Google added this feature, but I'm pretty sure it wasn't there a while ago.

You can now search on Google Image Search with advanced operators such as site:, inurl:, related:, etc. without the need for a second search term.

Comes in very handy if you want to find all images on a single domain: e.g. http://images.google.com/images?q=site%3Ablog.outer-court.com

I don't think this is new.

Check this (pretty old) page: http://www.google.com/help/faq_images.html

<< You can use all operators for image search that you would use in a Google text search. For example, you can use "site:" with image search to restrict your search to images on a particular website. So, to find all the pictures of lemurs at the Duke Primate Center, the query would be " site:duke.edu lemurs".>>

And I know you could always use site:duke.edu to see all the images from a site.

Yep, I saw that faq page too, but the example there consists of two search terms, not just the site: operator.

> And I know you could always use site:duke.edu to see all the images from a site.

I cannot remember Google ever returned *all* images for a site – before, I seem to remember you just got an empty page when trying 'site:'-only queries. But I might be mistaken, of course. Wonder if there is a way to verify this...

Maybe one of my posts from October last year (#4 in the list).

http://googlesystem.blogspot.com/2006/10/10-tips-for-google-image-search.html

Yeah, I've been using the site: operator on Google Images for a couple of years now. However, a long time ago it definitely didn't work for subfolders on a domain but it seems that it does now:

[site:blog.outer-court.com/forum/]
http://images.google.com/images?q=site%3Ablog.outer-court.com%2Fforum%2F

[site:blog.outer-court.com/files/]
http://images.google.com/images?q=site%3Ablog.outer-court.com%2Ffiles%2F

(I'm not sure when I last tried it though so it might not be that new...)

> Maybe one of my posts from October last year (#4 in the list).

You're right – it probably worked back then. My bad.

> it definitely didn't work for subfolders on a domain

Aha, then maybe *that*'s what's new :-)

I've always thought that image search is just a small side effect of the web search. So everything that works in the web search should work in the image search as well.

<< So everything that works in the web search should work in the image search as well. >>

Well, that *should* be the case but it's not always been that way... especially when it comes to index updates!

Yes, this has been used for some time now. Although im looking for ideas as to how does google list or search the images on a site? Is it based on the alt tags or just all the image files in the site?