Xcavator uses a
combination of text-based and visual search to help users sort through the images. It starts with text-based search, as you add a query to the search box, and Xcavator brings up images related to the
term. The Pandia team chose "wind mill" and got images of old-fashioned, modern, and toy wind mills.
After choosing an image, the tool allows you to match it to find others just like it--so choosing a modern wind mill would then bring up more modern-style choices. "Using this process I can refine my search several times, based on visual criteria and hardly any text," says the Pandia team.