As good as the Google Image search is, it can only find photos if the photo has the search terms in the name, or perhaps if the terms are on the web page that contains the image.
My son thinks that a better way might be to build a cross reference table, so if your are searching for 1963 beetle cars, the table might contain alternate keywords that resulted in successful clicks.
I was just reading Popular Technology and they have an article titled Picture Search which links to an image based image search. Retrievr allows you to use a paint like program to draw an image to use as a reference for searching…
Since my son has been looking for pictures of Herbie (the Love Bug), maybe I’ll have to let him give it a try.