Heikki Ruskeepää (2009). Mathematica Navigator: Mathematics, Statistics, and Graphics, p. 146. ISBN 978-0-12-374164-6. [1]. a b The terms "cross-eyed" and "wall-eyed" are borrowed from synonyms for various forms of strabismus, a condition where eyes do not point in the same direction when looking at an object. Wall-eyed viewing is informally known as parallel-viewing. A single image random text ASCII stereogram is an alternative to SIRDS using random ASCII text instead of dots to produce a 3D form of ASCII art.

Magic Eye – Home of Magic Eye Inc. Magic Eye – Home of Magic Eye Inc.

As the man behind Magic Eye, Baccei and his small team of designers orchestrated one of pop culture’s most bewildering whims, turning an obscure perceptual experiment into a publishing empire. To be honest, he finds the whole thing just as curious as you do. “It was the right place at the right time,” he said recently, speaking from his home in Vermont. The next day, Gregorek called up Baccei and told him that he wanted to make him rich. Courtesy of Ron Labbe/Studio 3D

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Depth perception results from many monocular and binocular visual clues. For objects relatively close to the eyes, binocular vision plays an important role in depth perception. Binocular vision allows the brain to create a single Cyclopean image and to attach a depth level to each point in it. [11] The two eyes converge on the object of attention. The optical illusion of an autostereogram is one of depth perception and involves stereopsis: depth perception arising from the different perspective each eye has of a three-dimensional scene, called binocular parallax.

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Not long after meeting, Baccei and Smith designed another autostereogram advertisement—this time with a hidden airplane—which ran in American Airlines’ inflight magazine, American Way. Baccei started getting calls mid-flight from flight attendants asking for the answer. “They were giving away bottles of champagne to the first person who could identify what was in the picture,” he said. An autostereogram is a two-dimensional (2D) image that can create the optical illusion of a three-dimensional (3D) scene. Autostereograms use only one image to accomplish the effect while normal stereograms require two. The 3D scene in an autostereogram is often unrecognizable until it is viewed properly, unlike typical stereograms. Viewing any kind of stereogram properly may cause the viewer to experience vergence-accommodation conflict. Scott B. Steinman, Barbara A. Steinman and Ralph Philip Garzia. (2000). Foundations of Binocular Vision: A Clinical perspective. McGraw-Hill Medical. ISBN 0-8385-2670-5 In 1991, N.E. Thing Enterprises began working with Tenyo Co., Ltd, a Japanese company know for selling an array of magic products. This relationship led to the christening of Magic Eye. “We called it Magic Eye because it translated well to Japanese—and because it had ‘magic’ in the name,” Smith recalled. At the time, Tenyo was selling Magic Eye autostereogram posters, postcards, and other retail products. When the company released the first three Magic Eye books later that year, Magic Eye became an overnight sensation. In the 1970s, Baccei was a bus driver for Green Tortoise, a purported “hippie” transportation company. He eventually moved on to work for Pentica Systems, a computer hardware company located just outside of Boston, Massachusetts. There, Baccei was tasked with advertising a MIME in-circuit emulator, which helped debug computer systems. Perhaps inevitably, he hired a mime for the ad.

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Those who wear eyeglasses with so-called "progressive" lenses, in which the focal length gradually changes so as to ease the viewing of close objects using the lower part of the lens, may find that viewing a stereogram is easier if the glasses are pushed up a little so that the stereogram is viewed through a part of the lens optimized for images that are closer than the actual distance to the stereogram. When the eyes are made divergent by looking (or pretending to look) at a far-away object, the overcorrection from viewing the stereogram through the "wrong" part of the lens can bring the stereogram into focus without needing to overcome the tendency to focus on the far-away object while attempting to focus on the stereogram. However, icons in a row do not need to be arranged at identical intervals. An autostereogram with varying intervals between icons across a row presents these icons at different depth planes to the viewer. The depth for each icon is computed from the distance between it and its neighbor at the left. These types of autostereograms are designed to be read in only one way, either cross-eyed or wall-eyed. All autostereograms in this article are encoded for wall-eyed viewing, unless specifically marked otherwise. An autostereogram encoded for wall-eyed viewing will produce inverse patterns when viewed cross-eyed, and vice versa. [b] Most Magic Eye pictures are also designed for wall-eyed viewing. This autostereogram displays patterns on three different planes by repeating the patterns at different spacings. ( ) a b c d Tyler, C.W. (1994). "The Birth of Computer Stereograms for Unaided Stereovision". In Horibuchi, S. (Ed.), Stereogram (pp. 83–89). San Francisco: Cadence Books. ISBN 0-929279-85-9.

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Grossman, John (1994-10-01). "In the Eye of the Beholder, Marketing Methods Article". Inc . Retrieved 2010-10-22. Hold the center of the printed image right up to your nose. It should be blurry. Focus as though you are looking through the image into the distance. Very slowly move the image away from your face until the two squares above the image turn into three squares. If you see four squares, move the image farther away from your face until you see three squares. If you see one or two squares, start over! R. Kimmel. (2002) 3D Shape Reconstruction from Autostereograms and Stereo. Journal of Visual Communication and Image Representation, 13:324–333. Webber, Ann; Wood, Joanne (November 2005). "Amblyopia - prevalence, natural history, functional effects and treatment". Clinical and Experimental Optometry. 88 (6): 365–375. doi: 10.1111/j.1444-0938.2005.tb05102.x. PMID 16329744. S2CID 39141527. In the late '90s many children's magazines featured autostereograms. Even gaming magazines like Nintendo Power had a section specifically made for these illusions.Single image stereogram (SIS). SIS differs from earlier stereograms in its use of a single 2D image instead of a stereo pair and is viewed without a device. Thus, the term is often used as a synonym of autostereogram. When the single 2D image is viewed with proper eye convergence, it causes the brain to fuse different patterns perceived by the two eyes into a virtual 3D image without, hidden within the 2D image, the aid of any optical equipment. SIS images are created using a repeating pattern. [18] [30] Programs for their creation include Mathematica. [31] [32]