In 1838, the British scientist Charles Wheatstone published an explanation of stereopsis (binocular depth perception) arising from differences in the horizontal positions of images in the two eyes. Wall-eyed viewing requires that the two eyes adopt a relatively parallel angle, while cross-eyed viewing requires a relatively convergent angle. ![]() Most autostereograms (including those in this article) 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. It pairs two adjacent patterns into a virtual object based on wrong parallax angles, thus placing the virtual object at a depth different from that of the autostereogram image. With an autostereogram, the brain receives repeating 2D patterns from both eyes, but fails to correctly match them. A stereoscope presents 2D images of the same object from slightly different angles to the left eye and the right eye, allowing the brain to reconstruct the original object via binocular disparity. Usually, a hidden 3D scene emerges when the image is viewed with the correct vergence.Īutostereograms are similar to normal stereograms except they are viewed without a stereoscope. In this type of autostereogram, every pixel in the image is computed from a pattern strip and a depth map. ![]() One such autostereogram is illustrated above right. The Magic Eye books feature another type of autostereogram called a random dot autostereogram. When viewed with proper vergence, the repeating patterns appear to float above or below 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 vergence. Click on thumbnail to see full-size image.Īn autostereogram is a single-image stereogram (SIS), designed to create the visual illusion of a three- dimensional (3D) scene from a two-dimensional image in the human brain. If the midline position of the imaging is not good, you can try to choose the second Create-Mode.A random dot autostereogram encodes a 3D scene which can be "seen" with proper viewing technique. A pattern with a transition edge will form a better imaging effect.ĥ. If the texture height more than 1080 pixels, it will be adjusted to 1080 pixels in creating.Ĥ. The height of texture determines the fine of image and the size of stereogram, also determines the creating time. You should select the texture its content is complex and rich color changes, the random-dot texture generated by software can guarantee good imaging effect.ģ. When you create a stereogram contains large amounts of text, you should try to reduce "Depth Range" and "Image distance",there should not contain too many characters in the frame width of watching, otherwise it will lead to reading difficulties.Ģ. Observe its reflection in screen, Search its reflection around.Īfter a while you should be able to see the three-dimensional image.ġ. ![]() Take the screen brightness down, place a finger or pen in front of the screen. >Pay attention, at first glance, you just can't see anything in stereogram, needs reading intently, through a special viewing method, it immediately become into a three-dimensional window that you have put into a various kinds of goods, try it,:)Ī practical method for watching stereogram: >The contents you most wanted somebody to see, can be turned into a magical stereogram by Autostereogram-Maker, and can be saved in your album or send to somebody. >What the most wanted to say are hidden in the stereogram only you two can read, for a big surprise. >Special day, sending the most special blessing to the most special person.
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