My site has always done really well in google images, ever since the new rollout happened my traffic from google.com / referral tanked. I have heard Google say that they break images out and I see that but I was wondering if images would get thrown into google.com / referral as well cause I can't see any other reason why it would drop unless I am looking at something wrong.
If you go to "Traffic Sources" -> "Sources" -> "Search" -> "Organic" you can then click on the "Primary Dimension" called "Source". I have both Google and images.google listed there. You should be able to click on each to see separate graphs.