The Van Hare Effect is a 3D stereoscopic viewing technique for creating or enhancing the illusion of depth in an image by means of stereopsis for binocular vision using psychophysical percepts. The Van Hare Effect creates the illusion of dimensionality, rather than actual dimensionality in the subject being viewed. The Van Hare Effect is achieved by employing the stereoscopic cross-eyed viewing technique on a pair of identical images placed side-by-side. In doing so, it artificially tricks the human brain and optical center into seeing depth in what is actually a two-dimensional, non-stereoscopic image. The illusion of depth is interesting in that even if the image pair is not itself originally stereoscopic, the brain perceives it as if it is. No special viewing apparatus is required as the brain is tricked into creating a false perception of a three-dimensional still image or video simply by viewing it with the cross-eyed technique.
Van Hare Effect
Stereoscopic Photo Links / SYETEOeYe
When Galen, in the second century, and Leonardo, thirteen centuries later, observed that the images received by the two eyes were slightly different, neither of them appreciated the full significance of these differences. Wheatstone confirmed the truth of his conjecture by an experimental method as simple as it was brilliant. He made pairs of drawings of a solid object as seen from the slightly different perspectives of the two eyes, and then designed an instrument that used mirrors to insure that each eye saw only its own drawing. So it is strange that stereopsis was not discovered centuries before: Euclid or Archimedes could have drawn stereo diagrams in the sand, as David Hubel has remarked, and discovered stereopsis in the third century B. But they did not, as far as we know. Queen Victoria herself was presented with a stereoscope after admiring one at the Great Exhibition, at the Crystal Palace, and soon no Victorian drawing room was complete without one.
Stereo view cards had two pictures mounted for parallel viewing, on 7 x 3. The pictures were taken with a two-lensed camera, recording the subject from two points of view separated by about 2. We have reprinted these cards with the left and right pictures interchanged, for cross eyed viewing. This allows larger images on the computer screen. In some cases we have corrected alignment and matched the image tone where one picture may have faded.
Stereoscopic equipment shows up in many movies and TV-series. On this page, you will find a few references, sorted by the name of the movie or TV-series. If you would like to contribute any quotations, please contact us. Alice Audrey Meadows is dying to have a TV set. But cheapskate Ralph Jackie Gleason lamely claims he's holding off until 3-D TV is developed "You know when we are going to get a new television, Alice?!!!