lucy24 - 3:35 pm on Apr 22, 2013 (gmt 0)
How can I see image search traffic in Google Analytics?
Here's one thing you can do: In new-style image search, an image file is requested when the user clicks on an image in search results. The referer at this point is "blank.html". (Literal text "blank", not a blank referer.) Rewrite image requests with this referer to a single-pixel gif set to expire immediately. This has no effect on the user, because they don't see the image yet; it's been requested ahead of time to make the search look more efficient. If the user clicks again, their browser has to make a second request-- and this time there's a different referer, so your rewrite doesn't kick in and they see the image.
Now you've got two data points: The preliminary click in image search, and the follow-up click, separately logged. Even if you don't end up learning anything useful, you've saved yourself some bandwidth.