In 1838, the British scientist Charles Wheatstone published an explanation of binocular vision (binocular depth perception) which had led him to make stereoscopic drawings and to construct a stereoscope based on a combination of mirrors to allow a person to see 3D images from two 2D pictures ( stereograms).īetween 18, David Brewster, a Scottish scientist, improved the Wheatstone stereoscope by using lenses instead of mirrors, thus reducing the size of the contraption. Wall-eyed viewing requires that the two eyes adopt a relatively divergent angle, while cross-eyed viewing requires a relatively convergent angle. Most autostereograms are designed to be viewed in only one way, which is usually wall-eyed. There are two ways an autostereogram can be viewed: wall-eyed and cross-eyed. Usually, a hidden 3D scene emerges when the image is viewed with proper viewing technique. In this type of autostereogram, every pixel in the image is computed from a pattern strip and a depth map. The Magic Eye series of books features another type of autostereogram called a random dot autostereogram. When viewed with proper convergence, the repeating patterns appear to float in the air above the background. The simplest type of autostereogram consists of horizontally repeating patterns and is known as a wallpaper autostereogram. In order to perceive 3D shapes in these autostereograms, the brain must overcome the normally automatic coordination between focusing and convergence. Click on thumbnail to see full-size image.Īn autostereogram is a single-image stereogram (SIS), designed to trick the human brain into perceiving a three- dimensional (3D) scene in a two-dimensional image. A random dot autostereogram encodes a 3D scene which can be "seen" with proper viewing technique.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |