Analog

Stereoscopic view of a lush mountain valley with a river running through it and coniferous trees in the foreground; rugged mountain peaks rise in the background.

These Animated Stereograms Bring 19th Century Photos to Life

Stereo images have been part of photography since its invention in the first half of the 19th century. Cameras enabled artists to produce two identical images from very slightly different perspectives -- all that is needed to create convincing "three-dimensional" images. While technically possible with paintings and drawings, cameras made stereograms significantly easier.