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Topic: Autostereogram

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Stereogram

Magic Eye

Grid illusion

Afterimage

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Hermann grid illusion

	Autostereogram - Wikipedia, the free encyclopedia
		An 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.
		Because autostereograms are constructed based on stereo vision, persons with a variety of visual impairments, even those affecting only one eye, are unable to see the three-dimensional images.
		Tyler, C.W. and Clarke, M.B. (1990) "The Autostereogram".
	en.wikipedia.org /wiki/Autostereogram (4554 words)

	Journal of Vision - Spatiotemporal relationships in a dynamic scene: stereomotion induction and suppression, by (Site not responding. Last check: 2007-10-12)
		The stereoscopic stimuli were generated in the form of repetitive autostereograms (Figure 1) consisting of five horizontal rows of disks with the central line of disks specified as the target (Minev and Likova, 1999).
		Thus, in the autostereogram presentation technique, the change in surround disparity depicted in Figure 1 was actually achieved by changing the spacing between each pair of dots from 70 pixels center-to-center to 80 pixels center-to-center (in 1.3’ pixels).
		In general, we are using the autostereogram technique as a convenient method of presenting wide-field stereograms without extra hardware devices (for future application in functional magnetic resonance imaging studies).
	journalofvision.org /3/4/5/article.html (7287 words)

	AVirtualSpaceTimeTravelMachine : ARE AUTOSTEREOGRAMS USEFUL FOR COMPUTER GRAPHICS AND SCIENTIFIC VISUALIZATION ?
		For animated autostereograms the situation is worse: as a matter of fact, the disguise texture is shifted according to the current depth; in an animation the depth field changes from frame to frame.
		The autostereogram algorithm is then used with both actual and intrinsic periods equal to one third the width of the "realistic" autostereograms to be generated.
		The obtained autostereograms (see Figure 5 for the still one and the Figure 6 for the animated one) display one third of the object with their colors and textures (by the way this process works for false and true colors pictures as well...).
	www.lactamme.polytechnique.fr /Mosaic/descripteurs/Autostereograms.01..html (1627 words)

	GIP Lab
		Autostereograms are images that provide the illusion of depth (3D image) by showing both eyes the same image (2D image).
		The general method for creating an autostereogram is choosing an interval (a vertical strip) within the 2D image, giving it certain values representing depth thus creating a basic pattern.
		The autostereogram is composed of those patterns repeated along its width.
	www.cs.technion.ac.il /~korland/index_files/autostreogram/autostreograms.htm (520 words)

	Stereopsis
		It is, in fact, required for viewing the autostereograms of the 1990's, when many millions of people aquired the skill.
		The key to how an autostereogram works is in a much older illusion, called the wallpaper illusion, when a certain motif is regularly repeated along a line.
		In an autostereogram, the same feature serves as part of two different images, one for each eye, and must be very cunningly placed for this to be possible.
	www.du.edu /~jcalvert/optics/stereops.htm (4937 words)

	Autostereogram (Site not responding. Last check: 2007-10-12)
		An autostereogram is a single-image stereogram (SIS), designed to trick human eyes and brains into seeing a three-dimensional scene in a two-dimensional image.
		Autostereograms are images that can be observed as 'flat' 2D pictures as well as a display of 3D objects without any extra apparatus.
		the 1990's with the invention of the autostereogram.
	www.form3d.info /create3d/autostereogram (720 words)

	Eye Care
		The principle to stereoscopic vision can be described in terms of the vision process involved in the use of a stereoscope, which presents an image from two slightly different angles so that the eyes can merge them into a single image in three dimensions.
		A type of stereoscopic picture called an autostereogram, not requiring a special viewing instrument, has been made possible by the advent of computer graphics.
		The latter is revealed when the viewer's eyes are focused on some point that is nearer or farther away than the autostereogram.
	www.eyecareindia.com /Spectrum.asp?id=8 (444 words)

	Society, Technology, Art: Ione
		Autostereograms are useful in expanding the understanding of binocularity.
		The evidence of the eye/brain relationship revealed by the autostereogram is one of the most revolutionary aspects of the random-dot stereogram and the beauty of the discovery was that it empirically explained that neither eye alone can perceive the form because neither eye alone contains the stereoscopic form.
		Of course, the autostereogram is only one example of how an image can be composed using computers.
	www.amyione.com /ivancao.html (3636 words)

	Autostereograms-Experimental Investigations
		Corresponding dots of an autostereogram are assigned slightly differing colors (rather small changes in the hue value).
		The foreground dots of one autostereogram are, e.g., red, and are, e.g., blue for the second autostereogram.
		With this approach the scenes of the two individual autostereograms are perceived as being transparent.
	www.cg.tuwien.ac.at /research/rendering/autostereograms (163 words)

	Autostereogram - Multimedia - MSN Encarta
		The autostereogram, or “magic eye” picture, is a remarkable kind of stereoscopic image that does not require a special instrument to be viewed.
		It is made by overlaying two pictures, each representing the view seen by one eye, and carefully matching them so that they are identical where they overlap.
		Whereas a conventional stereogram cannot easily be made wider than the distance between the eyes, autostereograms can be made very large.
	uk.encarta.msn.com /media_461542180_761554585_-1_1/Autostereogram.html (121 words)

	Texts - Considerations
		Bringing an autostereogram into focus is a gradual sensation, but switching from "autostereovision" to normal vision is abrupt, and can be uncomfortable.
		I find the best way to avoid any such discomfort is to breakaway from the autostereogram by briefly closing your eyes, and then opening them using normal vision.
		It's a lot of compromising, but my justification is to raise autostereograms to a high art form, and bring pleasure to those people who find their way to Color Stereo.
	www.colorstereo.com /texts_.txt/consider.htm (565 words)

	AVirtualSpaceTimeTravelMachine : GALLERY : GENERALITIES ABOUT VISUALIZATION [Generalites sur la Visualisation]
		Autostereogram with an hidden volcano and fractal phenomenon.
		Autostereogram with an hidden volcano by means of only 231 random points.
		Autostereogram with an hidden volcano and an animated disguise texture.
	www.lactamme.polytechnique.fr /Mosaic/descripteurs/Galerie_GeneralitiesVisualization.html (1708 words)

	Pixel Club lecture on 18 November 1997 (Site not responding. Last check: 2007-10-12)
		An autostereogram is a single image that has the capability to convey depth information in the same manner as a stereo pair.
		Given a depth profile, the autostereogram is completely characterized by a two-dimensional basic pattern (a vertical strip).
		Some autostereograms are more easily perceived than others depending on the basic pattern chosen to produce them.
	www.cs.technion.ac.il /Seminars/Pixel/lectures/Fred2.html (124 words)

	Bastian Goldluecke - Autostereograms (Site not responding. Last check: 2007-10-12)
		To decompose the image back into the two different parts, the eyes have to be trained to decouple convergence, which is the point where the lines of sight of both eyes cross, from focus, the depth which the lenses are adjusted to.
		Nowadays, algorithms for rendering single autostereogram images of a static scene, mostly based on the work by Thimbleby et al, are widely available on the Internet.
		However, traditional methods for the generation of autostereograms are too slow to create images of animated scenes at interactive frame rates.
	www.mpi-sb.mpg.de /~bg/research/autostereograms.shtml (523 words)

	[No title]
		The idea here is to create a depth map that changes through time, and then show the autostereogram images through time (so that you see a moving depth map).
		When you generate a autostereogram, usually, you pick a color for a pixel then propogate that color across a line in the image.
		After you've made an autostereogram, if you want to "change" the color of a pixel, then you need to propagate that change left and right across the image.
	www.cs.wustl.edu /~pless/assignments/project2.html (760 words)

	ione-spie
		From an artistic vantage point the autostereogram underlined there was a limitation in a long-standing academic technique in art education.
		The autostereogram is also an example of how an image can be composed using computers.
		We can also say, as discussed in the sections on Watkins and the autostereogram, that there is a difference between active viewing and superficial viewing.
	www.amyione.com /ione-spie.html (6040 words)

	Perception: ECVP 2003 abstracts (Site not responding. Last check: 2007-10-12)
		We synthesised a variant of autostereogram in which an inclined surface about a horizontal axis emerges when stereo matching occurs along epipolar lines implied by eccentric viewing.
		The autostereogram was surrounded by a frontoparallel annulus consisting of random dots with overall size disparity, of which the vertical component is relevant to gaze eccentricity.
		We found, using this stimulus configuration, that observers perceived the inclined surface in the central region when vertical size disparity in the surround was consistent with the gaze eccentricity simulated in the autostereogram, demonstrating that stereo matching occurred along the epipolar lines implied by vertical size disparity.
	www.perceptionweb.com /perception/ecvp03/1075.html (235 words)

	Stereograms - an introduction
		Autostereograms represent one of the latest approaches to creating the illusion of three dimensions.
		Now an autostereogram picture is basically made up of a pattern which repeats across the width of the page.
		When you diverge your eyes to "see" it each looks at adjacent repeats of the pattern, but the brain is fooled into believing that both eyes are still looking at exactly the same thing.
	www.techmind.org /stereo/sintro.html (623 words)

	About Autostereograms
		Since it is my wish to promote autostereograms as an art, rather than a science, I'll only try and give a quick overview of what we're dealing with.
		A stereogram is a flat two dimensional image viewed in such a fashion as to produce a three-dimensional effect.
		There are several kinds of autostereograms, but only two ways to view them for the 3-D effect.
	www.colorstereo.com /texts_.txt/aboutstr.htm (375 words)

	Reviews on Sisgen Autostereogram creator Look at tests, reports and read reviews: dooyoo.co.uk
		Sisgen Autostereogram creator : 3D or not 3D - That is the question.
		If you've stood looking cross-eyed at those stereo pictures made up of seemingly random patterens, but not been able to see a 3D image then this software is not for you.
		All you need to do is create a greyscale bitmap image with the distance encoded as brightness - the further a point is from the front the...
	www.dooyoo.co.uk /applications/sisgen-autostereogram-creator/reviews (206 words)

	andreapolli's weblog (Site not responding. Last check: 2007-10-12)
		She addresses active seeing in relationship to 20th century imaging technology, specifically the autostereogram:
		(an autostereogram is a 3D illusion that can be seen when the eyes change focus on a single image specifically created for that purpose.
		"With the autostereogram the viewer must fuse the representation experientially to see an embedded image — and thus cannot be a passive viewer.
	www.danchan.com /weblog/andreapolli/73530 (217 words)

	Tom Shelley
		To generate an autostereogram, the user must provide the program with a grayscale depth map image, the size of which will determine the size of the autostereogram created.
		This can have the effect of making the autostereograms more appealing and easier for the end user to visualize, but only if an appropriate pattern is used.
		It appears that the more 'noise' a pattern contains, the easier it is for a coherent autostereogram to be generated.
	cec.wustl.edu /~ts2/cs519abc/project3.html (382 words)

	[No title]
		Those who persevere will be well rewarded and may well find a whole new dimension in their visual lives.
		In order to see an image like this, you need to hold your face approximately 2 feet from your screen, or if your screen is particularly small, (15 inches or smaller) then a little closer, say 18 inches.
		The more out of focus you allow your vision to become, the more you relax your brain, the more likely the image is to appear, and appear it will - with astonishing effect.
	www.chatarea.com /3MoonsofGorSoapboxCentral.quote1680887 (742 words)

	Home > Maina, Guam, GU, 96922, Maina Real Estate, Maina Yellow Pages, Maina Classifieds, Maina News, Maina Events, ... (Site not responding. Last check: 2007-10-12)
		Anaglyph images, also recognized as "red/green" or "magenta/cyan" images, combine two stereo images from slightly different viewpoints into a single image.
		Autostereograms produce an illusion of depth using only a single image.
		SIRDS (Single Image Random Dot Stereogram) is a form of autostereogram where each repeated pattern is altered slightly, creating a hidden image which is not discernible unless the right viewing technique is used.
	maina.guamus.com /profile/Stereogram (1087 words)

	An Autostereogram Decoder
		An autostereogram is a seemingly-random 2D collection of dots that produces a 3D effect without requiring any special devices like 3D glasses.
		In order to tap into this mystery world, I decided to write an autostereogram decoder that converts an autostereogram into a depth image, reversing the process that created the autostereogram in the first place.
		In my talk, I'll discuss how autostereograms work, how they're made, and how they can be decoded.
	graphics.stanford.edu /~kekoa/talks/gcafe-20030417 (308 words)

	Magic Eye - Wikipedia, the free encyclopedia
		The books feature autostereograms, which allow people to see 3D images by focusing on 2D patterns.
		The autostereogram predates the Magic Eye series by several years.
		Christopher Tyler created the first autostereograms in 1979.
	en.wikipedia.org /wiki/Magic_Eye (348 words)

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