Images are rated by how likely they are to contain relevant content (as opposed to decorations, ads, and navigation elements). Even fast and dirty ratings like "largest, squarest, and most colorful" yield good results. Groups of images are arranged in space-saving spirals with the highest-rated images near the center, making it possible to get the quick gist of a large image collection with very little eye movement. Multiple groups may be arranged in a super-spiral by recursive application of the layout algorithm.

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