| http://www.w3.org/ns/prov#value | - The optical imaging device 50 is generally positioned above the key 22 and 24and directed downward such that a silhouette of the key 22 and 24, including the blade 32 of the key 22 and 24, may be captured.In one embodiment, the optical imaging device 50 is a camera, and the image captured is a photographic image.
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