Most flatbed scanners use two separate light bulbs to accurately capture all the colour in a photo. By controlling these independently of each other, two slightly different images (each taken from different directions as the bulbs move under the photo) can be captured of the same photograph. From these, rudimentary 3D information can be generated.
Slashdot Mirror
Most flatbed scanners use two separate light bulbs to accurately capture all the colour in a photo. By controlling these independently of each other, two slightly different images (each taken from different directions as the bulbs move under the photo) can be captured of the same photograph. From these, rudimentary 3D information can be generated.